CVE-2026-8924

CRITICALPre-NVD 9.19.1
EchelonGraph scoreMEDIUM confidence

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

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-03. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Elevated

Also known asEUVD-2026-41505 (ENISA EUVD) · GHSA-hm6c-rc5h-32m9 (GitHub Security Advisories)Source: ENISA EUVD

9.1EG
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).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 9.1Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

A flaw in curl’s cookie parsing logic allows a malicious HTTP server to set "super cookies" that bypass the Public Suffix List check. This enables an attacker-controlled origin to inject cookies that curl subsequently scopes and transmits to unrelated third-party domains.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
72
EG Risk 72/100

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)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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
0.7%
EPSS %ILE
52nd
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 (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.7% 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, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 3 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, Track* at medium and Attend at high mission impact.

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

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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)3 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 total (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

July 3, 2026

Last Modified

September 15, 2026

Advisory Details (3)

Auto-updated Sep 15, 2026
Patch available.
Web page

curl - trailing dot domain super cookie - CVE-2026-8924

https://curl.se/docs/CVE-2026-8924.html

Patch Availability(13)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibcurl4-openssl-dev (7.68.0-1ubuntu2.25+esm4) @ focal2026-11-03ubuntu
redhatcurl-0:7.76.1-31.el9_6.42026-11-02redhat
redhatopenvox-agent-0:8.31.1-1.el9sat2026-10-29redhat
redhatcurl-0:7.61.1-34.el8_10.182026-10-29redhat
redhatopenshift/ose-rhel-coreos-9:4.22.9.8.202610241758-02026-10-27redhat
redhatrhui5/rhua-rhel9:17919786932026-10-14redhat
redhatcurl-0:7.76.1-40.el9_8.82026-10-12redhat
redhatcostmanagement/costmanagement-ui-rhel10:17914608512026-10-08redhat
redhatcurl-0:8.12.1-1.el10_0.102026-09-28redhat
redhatcurl-0:8.12.1-4.el10_2.62026-09-21redhat
redhatjbcs-httpd24-curl2026-08-19redhat
redhatrust-main-1.96.1-1.hum12026-07-02redhat
redhatcurl-main-8.21.0-0.1.hum12026-06-24redhat

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

(8 across 8 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.46.0 up to 8.14.1-r3: fixed in 8.14.1-r3
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.46.0 up to 8.14.1-r4: fixed in 8.14.1-r4
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.46.0 up to 8.22.0-r0: fixed in 8.22.0-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.46.0 up to 8.21.0-r0: fixed in 8.21.0-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
curl7.74.0-1.3 ... 8.9.1-2~bpo12+1 (219 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
curl7.88.1-10 ... 8.9.1-2~bpo12+1 (186 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
curl8.14.1-2 ... 8.14.1-2+deb13u5 (7 versions)
  • every version up to 8.14.1-2+deb13u7: fixed in 8.14.1-2+deb13u7
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
curl8.14.1-2 ... 8.21.0~rc1-1+exp1 (59 versions)
  • every version up to 8.21.0~rc2-1: fixed in 8.21.0~rc2-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 21× in last 7d / 94× 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 786 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 686 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:35 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  2. 2026-11-12 11:38 UTCEchelonGraph re-scored
  3. 2026-11-12 11:38 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  4. 2026-11-11 16:41 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  5. 2026-11-11 13:26 UTCEchelonGraph re-scored
  6. 2026-11-11 13:26 UTCVendor advisory
  7. 2026-11-11 13:26 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  8. 2026-11-10 16:46 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  9. 2026-11-10 15:14 UTCVendor advisory
  10. 2026-11-10 15:14 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  11. 2026-11-09 17:02 UTCEchelonGraph re-scored
  12. 2026-11-09 17:02 UTCVendor advisory
  13. 2026-11-09 17:02 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  14. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  15. 2026-11-08 18:50 UTCEchelonGraph re-scored
  16. 2026-11-08 18:50 UTCVendor advisory
  17. 2026-11-08 18:50 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  18. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  19. 2026-11-07 20:38 UTCEchelonGraph re-scored
  20. 2026-11-07 20:38 UTCVendor advisory
  21. 2026-11-07 20:38 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  22. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  23. 2026-11-06 22:26 UTCEchelonGraph re-scored
  24. 2026-11-06 22:26 UTCVendor advisory
  25. 2026-11-06 22:26 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
Show 75 more
  1. 2026-11-06 21:25 UTCOSV refresh
  2. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  3. 2026-11-06 00:14 UTCEchelonGraph re-scored
  4. 2026-11-06 00:14 UTCVendor advisory
  5. 2026-11-06 00:14 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  6. 2026-11-05 16:39 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  7. 2026-11-05 02:02 UTCEchelonGraph re-scored
  8. 2026-11-05 02:02 UTCVendor advisory
  9. 2026-11-05 02:02 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  10. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  11. 2026-11-04 03:50 UTCEchelonGraph re-scored
  12. 2026-11-04 03:50 UTCVendor advisory
  13. 2026-11-04 03:50 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  14. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  15. 2026-11-03 05:38 UTCEchelonGraph re-scored
  16. 2026-11-03 05:38 UTCVendor advisory
  17. 2026-11-03 05:38 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  18. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  19. 2026-11-02 07:26 UTCEchelonGraph re-scored
  20. 2026-11-02 07:26 UTCVendor advisory
  21. 2026-11-02 07:26 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  22. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  23. 2026-11-01 09:14 UTCEchelonGraph re-scored
  24. 2026-11-01 09:14 UTCVendor advisory
  25. 2026-11-01 09:14 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  26. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  27. 2026-10-31 11:02 UTCEchelonGraph re-scored
  28. 2026-10-31 11:02 UTCVendor advisory
  29. 2026-10-31 11:02 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  30. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  31. 2026-10-30 12:50 UTCEchelonGraph re-scored
  32. 2026-10-30 12:50 UTCVendor advisory
  33. 2026-10-30 12:50 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  34. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  35. 2026-10-29 14:33 UTCEchelonGraph re-scored
  36. 2026-10-29 14:33 UTCVendor advisory
  37. 2026-10-29 14:33 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  38. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  39. 2026-10-28 16:22 UTCVendor advisory
  40. 2026-10-28 16:22 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  41. 2026-10-27 18:10 UTCEchelonGraph re-scored
  42. 2026-10-27 18:10 UTCVendor advisory
  43. 2026-10-27 18:10 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  44. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  45. 2026-10-26 19:59 UTCEchelonGraph re-scored
  46. 2026-10-26 19:59 UTCVendor advisory
  47. 2026-10-26 19:59 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  48. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  49. 2026-10-25 19:43 UTCEchelonGraph re-scored
  50. 2026-10-25 19:43 UTCVendor advisory
  51. 2026-10-25 19:43 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  52. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  53. 2026-10-25 13:53 UTCEchelonGraph re-scored
  54. 2026-10-24 21:29 UTCEchelonGraph re-scored
  55. 2026-10-24 21:29 UTCVendor advisory
  56. 2026-10-24 21:29 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  57. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  58. 2026-10-23 23:14 UTCEchelonGraph re-scored
  59. 2026-10-23 23:14 UTCVendor advisory
  60. 2026-10-23 23:14 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  61. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  62. 2026-10-23 00:50 UTCEchelonGraph re-scored
  63. 2026-10-23 00:50 UTCVendor advisory
  64. 2026-10-23 00:50 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  65. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  66. 2026-10-22 01:59 UTCEchelonGraph re-scored
  67. 2026-10-22 01:59 UTCVendor advisory
  68. 2026-10-22 01:59 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  69. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  70. 2026-10-21 03:45 UTCEchelonGraph re-scored
  71. 2026-10-21 03:45 UTCVendor advisory
  72. 2026-10-21 03:45 UTCGHSA enrichmentGHSA-hm6c-rc5h-32m9 · GitHub severity CRITICAL · GitHub CVSS 9.1
  73. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  74. 2026-10-20 05:20 UTCEchelonGraph re-scored
  75. 2026-10-20 05:20 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-8924?
CVE-2026-8924 is a critical-severity vulnerability; its CVE record was published on July 3, 2026. A flaw in curl’s cookie parsing logic allows a malicious HTTP server to set "super cookies" that bypass the Public Suffix List check. This enables an attacker-controlled origin to inject cookies that curl subsequently scopes and transmits to unrelated third-party domains.
When was the CVE record for CVE-2026-8924 published?
The CVE record for CVE-2026-8924 was published on July 3, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 15, 2026; the record at its source may have been updated since.
Is CVE-2026-8924 actively exploited?
CVE-2026-8924 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (52nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-8924?
CVE-2026-8924 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-8924?
A fix for CVE-2026-8924 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-8924 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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