CVE-2026-33846

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-04. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-26926 (ENISA EUVD) · GHSA-qcj7-gqxf-2cqq (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.3%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The issue arises in merge_handshake_packet() where incoming handshake fragments are matched and merged based solely on handshake type, without validating that the message_length field remains consistent across all fragments of the same logical message. An attacker can exploit this by sending crafted DTLS fragments with conflicting message_length values, causing the implementation to allocate a buffer based on a smaller initial fragment and subsequently write beyond its bounds using larger, inconsistent fragments. Because the merge operation does not enforce proper bounds checking against the allocated buffer size, this results in an out-of-bounds write on the heap. The vulnerability is remotely exploitable without authentication via the DTLS handshake path and can lead to application crashes or potential memory corruption.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.3%
EPSS %ILE
70th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 4, 2026

Last Modified

November 4, 2026

Advisory Details (2)

Auto-updated May 4, 2026
Patch available. Sources: redhat.
Red Hat

2450625 – (CVE-2026-33846) CVE-2026-33846 gnutls: GnuTLS: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly

https://bugzilla.redhat.com/show_bug.cgi?id=2450625
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-33846

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatcert-manager/cert-manager-operator-bundle:17919662592026-10-14redhat
redhatcert-manager/cert-manager-operator-bundle:17919704842026-10-14redhat
redhatcert-manager/jetstack-cert-manager-rhel9:17914597112026-10-13redhat
redhatcert-manager/cert-manager-operator-rhel9:17917882872026-10-13redhat
redhatcert-manager/cert-manager-operator-rhel9:17890290762026-10-13redhat
redhatcert-manager/jetstack-cert-manager-rhel9:17913710692026-10-13redhat
redhatcert-manager/cert-manager-istio-csr-rhel9:17914597592026-10-13redhat
redhatrhai/base-image-neuron-rhel9:17907035422026-10-01redhat
redhatcert-manager/cert-manager-trust-manager-rhel9:17905985932026-09-28redhat
redhatopenshift/ose-rhel-coreos-9:413.92.202609080414-02026-09-17redhat
redhatopenshift/ose-rhel-coreos-9:417.94.202608250221-02026-09-03redhat
redhatopenshift/ose-rhel-coreos-8:412.86.202608241157-02026-09-03redhat
redhatopenshift/ose-rhel-coreos-9:416.94.202608150307-02026-08-31redhat
redhatopenshift/ose-rhel-coreos-9:414.92.202608172040-02026-08-31redhat
redhatopenshift/ose-rhel-coreos-9:415.92.202608180329-02026-08-31redhat
redhatopenshift/ose-rhel-coreos-9:4.19.9.6.202608182320-02026-08-26redhat
redhatopenshift/ose-rhel-coreos-9:418.94.202608142238-02026-08-26redhat
redhatrhui5/rhua-tp-rhel9:17872412602026-08-24redhat
redhatgnutls-0:3.7.6-21.el9_2.72026-07-20redhat
redhatrhaiis/vllm-cuda-rhel9:17829510122026-07-06redhat
redhatrhaiis/vllm-rocm-rhel9:17829512442026-07-06redhat
redhatrhaiis/model-opt-cuda-rhel9:17829510512026-07-06redhat
redhatgnutls-0:3.3.29-9.el7_9.12026-07-01redhat
redhatgnutls-0:3.8.3-4.el9_4.62026-06-29redhat
redhatlibtasn1-0:4.13-3.el8_6.22026-06-29redhat
redhatlibtasn1-0:4.13-4.el8_8.12026-06-29redhat
redhatlibtasn1-0:4.13-3.el8_4.12026-06-29redhat
redhatgnutls-0:3.8.3-6.el9_6.42026-06-25redhat
redhatdiscovery/discovery-ui-rhel9:17821669522026-06-24redhat
redhatgnutls-0:3.8.9-9.el10_0.192026-06-16redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.7.1-5 ... 3.7.1-5+deb11u9 (10 versions)
  • every version up to 3.7.1-5+deb11u10: fixed in 3.7.1-5+deb11u10
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.7.9-2 ... 3.7.9-2+deb12u6 (7 versions)
  • every version up to 3.7.9-2+deb12u7: fixed in 3.7.9-2+deb12u7
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.8.9-3, 3.8.9-3+deb13u1, 3.8.9-3+deb13u2, 3.8.9-3+deb13u3
  • every version up to 3.8.9-3+deb13u4: fixed in 3.8.9-3+deb13u4
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.8.10-1 ... 3.8.9-3 (11 versions)
  • every version up to 3.8.13-1: fixed in 3.8.13-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(16)

Data Freshness Timeline

(refreshed 9× in last 7d / 46× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 461 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 361 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:52 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  3. 2026-11-12 03:40 UTCEchelonGraph re-scored
  4. 2026-11-12 03:40 UTCVendor advisory
  5. 2026-11-12 03:40 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  6. 2026-11-11 16:39 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  7. 2026-11-10 16:43 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  8. 2026-11-09 16:35 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  9. 2026-11-08 16:39 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  10. 2026-11-07 16:38 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  11. 2026-11-06 16:37 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  12. 2026-11-05 16:37 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  13. 2026-11-04 23:27 UTCEchelonGraph re-scored
  14. 2026-11-04 23:27 UTCVendor advisory
  15. 2026-11-04 23:27 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-11-04 22:35 UTCEchelonGraph re-scored
  17. 2026-11-04 22:35 UTCVendor advisory
  18. 2026-11-04 22:35 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-11-04 16:35 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  20. 2026-11-03 16:47 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  21. 2026-11-02 23:41 UTCEchelonGraph re-scored
  22. 2026-11-02 23:41 UTCVendor advisory
  23. 2026-11-02 23:41 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  24. 2026-11-02 16:44 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  25. 2026-11-01 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
Show 75 more
  1. 2026-10-31 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  2. 2026-10-30 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  3. 2026-10-29 16:33 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  4. 2026-10-28 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  5. 2026-10-27 16:31 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  6. 2026-10-26 19:28 UTCEchelonGraph re-scored
  7. 2026-10-26 19:28 UTCVendor advisory
  8. 2026-10-26 19:28 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  9. 2026-10-26 16:31 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  10. 2026-10-25 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  11. 2026-10-25 14:34 UTCEchelonGraph re-scored
  12. 2026-10-24 16:32 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  13. 2026-10-23 16:31 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  14. 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  15. 2026-10-22 00:52 UTCEchelonGraph re-scored
  16. 2026-10-22 00:52 UTCVendor advisory
  17. 2026-10-22 00:52 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  18. 2026-10-21 16:32 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  19. 2026-10-20 16:33 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  20. 2026-10-19 16:31 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  21. 2026-10-18 16:31 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  22. 2026-10-18 03:46 UTCEchelonGraph re-scored
  23. 2026-10-17 16:34 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  24. 2026-10-16 16:41 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  25. 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  26. 2026-10-14 20:32 UTCEchelonGraph re-scored
  27. 2026-10-14 20:32 UTCVendor advisory
  28. 2026-10-14 20:32 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  29. 2026-10-14 19:31 UTCEchelonGraph re-scored
  30. 2026-10-14 19:31 UTCVendor advisory
  31. 2026-10-14 19:31 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  32. 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  33. 2026-10-14 03:29 UTCEchelonGraph re-scored
  34. 2026-10-14 03:29 UTCVendor advisory
  35. 2026-10-14 03:28 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  36. 2026-10-14 03:02 UTCEchelonGraph re-scored
  37. 2026-10-14 03:02 UTCVendor advisory
  38. 2026-10-14 03:02 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  39. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  40. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  41. 2026-10-12 16:13 UTCEchelonGraph re-scored
  42. 2026-10-11 19:55 UTCEchelonGraph re-scored
  43. 2026-10-11 17:08 UTCEchelonGraph re-scored
  44. 2026-10-11 14:35 UTCEchelonGraph re-scored
  45. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  46. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  47. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  48. 2026-10-08 21:21 UTCEchelonGraph re-scored
  49. 2026-10-08 21:21 UTCVendor advisory
  50. 2026-10-08 21:21 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  51. 2026-10-08 17:12 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  52. 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  53. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  54. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  55. 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  56. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  57. 2026-10-02 03:30 UTCEchelonGraph re-scored
  58. 2026-10-02 03:30 UTCVendor advisory
  59. 2026-10-02 03:30 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  60. 2026-10-02 02:42 UTCEchelonGraph re-scored
  61. 2026-10-02 02:42 UTCVendor advisory
  62. 2026-10-02 02:42 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  63. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  64. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  65. 2026-09-29 01:20 UTCEchelonGraph re-scored
  66. 2026-09-29 01:20 UTCVendor advisory
  67. 2026-09-29 01:20 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  68. 2026-09-29 00:56 UTCEchelonGraph re-scored
  69. 2026-09-29 00:56 UTCVendor advisory
  70. 2026-09-29 00:56 UTCGHSA enrichmentGHSA-qcj7-gqxf-2cqq · GitHub severity HIGH · GitHub CVSS 7.5
  71. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  72. 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  73. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  74. 2026-09-26 00:26 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  75. 2026-09-20 20:15 UTCEPSS rescoreEPSS 1.3% · 68th percentile

Frequently asked(5)

What is CVE-2026-33846?
CVE-2026-33846 is a high-severity vulnerability; its CVE record was published on May 4, 2026. A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The issue arises in merge_handshake_packet() where incoming handshake fragments are matched and merged based solely on handshake type, without validating that the message_length field remains…
When was CVE-2026-33846 made public?
CVE-2026-33846 was made public on May 4, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on May 4, 2026. EchelonGraph's copy of the record carries a last-modified date of November 4, 2026; the record at its source may have been updated since.
Is CVE-2026-33846 actively exploited?
CVE-2026-33846 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.3% probability of exploitation in the next 30 days (70th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-33846?
CVE-2026-33846 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-33846?
A fix for CVE-2026-33846 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-33846 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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