CVE-2026-3497

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: MODERATE) published 2026-03-12. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2026-11684 (ENISA EUVD) · GHSA-wcpp-3x59-h8vp (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: 2.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpkt_disconnect() on an error, which does not terminate the process, allows an attacker to send an unexpected GSSAPI message type during the GSSAPI key exchange to the server, which will call the underlying function and continue the execution of the program without setting the related connection variables. As the variables are not initialized to NULL the code later accesses those uninitialized variables, accessing random memory, which could lead to undefined behavior. The recommended workaround is to use ssh_packet_disconnect() instead, which does terminate the process. The impact of the vulnerability depends heavily on the compiler flag hardening configuration.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
50
EG Risk 50/100

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.
Exploitation2.4% × 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
2.4%
EPSS %ILE
84th
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
2.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). 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

March 12, 2026

Last Modified

November 10, 2026

Advisory Details (10)

Auto-updated Jun 10, 2026
Patch available. Sources: ubuntu.
Web pageMentions a patch (unverified)

[SECURITY] [DLA 4535-1] openssh security update

https://lists.debian.org/debian-lts-announce/2026/04/msg00014.html
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/7
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/5
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/4
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/2
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/14/4
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/14/3
Web page

oss-security - OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/12/3
Web page

oss-security - OpenSSH GSSAPI keyex patch issue

https://www.openwall.com/lists/oss-security/2026/03/12/3
UbuntuMentions a patch (unverified)

CVE-2026-3497 | Ubuntu

https://ubuntu.com/security/CVE-2026-3497

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntussh-askpass-gnome (1:8.2p1-4ubuntu0.13+esm1) @ focal2026-10-28ubuntu
redhatrhaiis/model-opt-cuda-rhel9:17806819842026-06-10redhat
redhatopenshift/ose-rhel-coreos-8:412.86.202605271418-02026-06-04redhat
redhatopenshift/ose-rhel-coreos-9:413.92.202605271328-02026-06-04redhat
redhatopenshift/ose-rhel-coreos-9:416.94.202605200242-02026-05-29redhat
redhatopenshift/ose-rhel-coreos-9:4.19.9.6.202605201155-02026-05-27redhat
redhatopenshift/ose-rhel-coreos-9:417.94.202605112123-02026-05-20redhat
redhatrhaiis/vllm-rocm-rhel9:17792236512026-05-20redhat
redhatrhaiis/vllm-cuda-rhel9:17792236542026-05-20redhat
redhatopenshift/ose-rhel-coreos-9:415.92.202605060220-02026-05-13redhat
redhatopenshift/ose-rhel-coreos-9:414.92.202605060243-02026-05-13redhat
redhatrhaiis/vllm-spyre-rhel9:17782445462026-05-12redhat
redhatopenshift/ose-rhel-coreos-9:418.94.202604240015-02026-05-11redhat
redhatrhaiis/model-opt-cuda-rhel9:17782445592026-05-11redhat
redhatrhaiis/vllm-cuda-rhel9:17782746662026-05-11redhat
redhatopenssh-0:8.0p1-7.el8_4.12026-05-11redhat
redhatrhaiis/vllm-rocm-rhel9:17782445312026-05-11redhat
redhatopenssh-0:8.0p1-15.el8_6.42026-05-11redhat
redhatopenssh-0:8.0p1-20.el8_8.32026-05-07redhat
redhatrhpam-7/rhpam-smartrouter-rhel8:7.13.5-4.17773257082026-05-05redhat
redhatopenssh-0:8.7p1-13.el9_0.22026-05-05redhat
redhatopenssh-0:8.7p1-30.el9_2.102026-04-27redhat
redhatrhui5/rhua-rhel9:17768688422026-04-23redhat
redhatopenssh-0:8.7p1-38.el9_4.72026-04-22redhat
redhatopenssh-0:8.7p1-45.el9_6.22026-04-21redhat
redhatopenssh-0:9.9p1-7.el10_0.22026-04-08redhat
redhatopenssh-0:8.7p1-48.el9_72026-04-02redhat
redhatopenssh-0:9.9p1-13.el10_12026-04-02redhat
redhatopenssh-0:8.0p1-28.el8_102026-04-02redhat
redhatopenssh-main-10.2p1-9.hum12026-03-23redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
openssh1:8.4p1-5 ... 1:8.4p1-5+deb11u5 (6 versions)
  • every version up to 1:8.4p1-5+deb11u6: fixed in 1:8.4p1-5+deb11u6
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
openssh1:9.2p1-2 ... 1:9.2p1-2+deb12u8 (9 versions)
  • every version up to 1:9.2p1-2+deb12u9: fixed in 1:9.2p1-2+deb12u9
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
openssh1:10.0p1-7, 1:10.0p1-7+deb13u1
  • every version up to 1:10.0p1-7+deb13u2: fixed in 1:10.0p1-7+deb13u2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
openssh1:10.0p1-7 ... 1:10.2p1-6~bpo13+1 (11 versions)
  • every version up to 1:10.2p1-6: fixed in 1:10.2p1-6
—

Weakness Classification(2)

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

Additional Vendor Advisories

(5)

Data Freshness Timeline

(refreshed 14× in last 7d / 48× 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 295 rows on record for this CVE, as 99 entries (1 repeat merged).

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. 1 repeat row among the latest 100 is merged into the row it repeats. The 195 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:33 UTCEPSS rescoreEPSS 2.4% · 84th percentile
  2. 2026-11-11 16:39 UTCEPSS rescoreEPSS 2.4% · 84th percentile
  3. 2026-11-11 03:53 UTCEchelonGraph re-scored
  4. 2026-11-11 03:53 UTCVendor advisory
  5. 2026-11-11 03:53 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub severity MODERATE · GitHub CVSS 7.5
  6. 2026-11-10 16:43 UTCEPSS rescoreEPSS 2.4% · 83rd percentile
  7. 2026-11-10 13:27 UTCVendor advisory
  8. 2026-11-10 13:27 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub severity MODERATE · GitHub CVSS 7.5
  9. 2026-11-10 13:27 UTCNVD updateCVSS v4 → 6.9
  10. 2026-11-10 12:45 UTCEchelonGraph re-scored
  11. 2026-11-10 12:45 UTCVendor advisory
  12. 2026-11-10 12:45 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub severity MODERATE · GitHub CVSS 7.5
  13. 2026-11-09 16:35 UTCEPSS rescoreEPSS 2.4% · 83rd percentile
  14. 2026-11-08 16:39 UTCEPSS rescoreEPSS 2.4% · 83rd percentile
  15. 2026-11-07 16:39 UTCEPSS rescoreEPSS 2.4% · 83rd percentile
  16. 2026-11-06 16:37 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  17. 2026-11-05 16:37 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  18. 2026-11-04 16:35 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  19. 2026-11-04 10:50 UTCEchelonGraph re-scored
  20. 2026-11-04 10:50 UTCVendor advisory
  21. 2026-11-04 10:50 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub severity MODERATE · GitHub CVSS 7.5
  22. 2026-11-03 16:48 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  23. 2026-11-02 16:44 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  24. 2026-11-01 16:34 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  25. 2026-10-31 16:32 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
Show 74 more
  1. 2026-10-30 16:34 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  2. 2026-10-29 16:33 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  3. 2026-10-28 16:32 UTCEPSS rescoreEPSS 2.2% · 82nd percentile
  4. 2026-10-28 06:35 UTCEchelonGraph re-scored
  5. 2026-10-28 06:35 UTCVendor advisory
  6. 2026-10-28 06:35 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  7. 2026-10-27 16:31 UTCEPSS rescoreEPSS 2.2% · 82nd percentile
  8. 2026-10-26 16:31 UTCEPSS rescoreEPSS 2.2% · 82nd percentile
  9. 2026-10-25 16:32 UTCEPSS rescoreEPSS 2.2% · 82nd percentile
  10. 2026-10-25 14:33 UTCEchelonGraph re-scored
  11. 2026-10-24 16:32 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  12. 2026-10-23 16:31 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  13. 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  14. 2026-10-21 16:33 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  15. 2026-10-20 19:07 UTCEchelonGraph re-scored
  16. 2026-10-20 19:07 UTCVendor advisory
  17. 2026-10-20 19:07 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  18. 2026-10-20 16:33 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  19. 2026-10-19 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  20. 2026-10-18 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  21. 2026-10-18 03:45 UTCEchelonGraph re-scored
  22. 2026-10-17 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  23. 2026-10-16 16:42 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  24. 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  25. 2026-10-15 02:33 UTCVendor advisory
  26. 2026-10-15 02:33 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  27. 2026-10-15 02:25 UTCNVD updateCVSS v4 → 6.9
  28. 2026-10-15 01:37 UTCEchelonGraph re-scored
  29. 2026-10-15 01:37 UTCVendor advisory
  30. 2026-10-15 01:37 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  31. 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  32. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  33. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  34. 2026-10-12 16:12 UTCEchelonGraph re-scored
  35. 2026-10-11 19:54 UTCEchelonGraph re-scored
  36. 2026-10-11 17:07 UTCEchelonGraph re-scored
  37. 2026-10-11 14:34 UTCEchelonGraph re-scored
  38. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  39. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  40. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  41. 2026-10-08 17:12 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  42. 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  43. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  44. 2026-10-05 17:43 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  45. 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  46. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  47. 2026-10-01 19:50 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  48. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  49. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  50. 2026-09-28 01:19 UTCOSV refresh
  51. 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  52. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  53. 2026-09-26 00:26 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  54. 2026-09-20 20:15 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  55. 2026-09-18 19:28 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  56. 2026-09-17 19:30 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  57. 2026-09-16 14:08 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  58. 2026-09-16 05:15 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  59. 2026-09-15 03:11 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  60. 2026-09-12 15:01 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  61. 2026-09-11 14:53 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  62. 2026-09-11 09:37 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  63. 2026-09-10 09:34 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  64. 2026-09-08 22:00 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  65. 2026-09-08 09:19 UTCEchelonGraph re-scored
  66. 2026-09-08 09:19 UTCVendor advisory
  67. 2026-09-08 09:18 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  68. 2026-09-07 16:01 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  69. 2026-09-06 13:47 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  70. 2026-09-04 05:06 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  71. 2026-09-02 14:12 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  72. 2026-09-01 13:53 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  73. 2026-09-01 12:24 UTCEchelonGraph re-scored
  74. 2026-09-01 12:24 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-3497?
CVE-2026-3497 is a high-severity vulnerability; its CVE record was published on March 12, 2026. Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpkt_disconnect() on an error, which does not terminate the…
When was CVE-2026-3497 made public?
CVE-2026-3497 was made public on March 12, 2026: that is the date its CVE record's CNA, Canonical Ltd., gives for when the vulnerability was made public. The CVE record itself was published on March 12, 2026. EchelonGraph's copy of the record carries a last-modified date of November 10, 2026; the record at its source may have been updated since.
Is CVE-2026-3497 actively exploited?
CVE-2026-3497 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.4% probability of exploitation in the next 30 days (84th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-3497?
CVE-2026-3497 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-3497?
A fix for CVE-2026-3497 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-3497 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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