CVE-2026-8924

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

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, epss, ghsa
Elevated
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 9.1Exploit: Elevated riskExposed 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 intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity91% × 45%
Exploitation40% × 40%
Automatability100% × 15%
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

Published

July 3, 2026

Last Modified

September 15, 2026

Advisory Details (3)

Auto-updated Sep 15, 2026
Patch available.
generic

HackerOne

https://hackerone.com/reports/3733905
generic
https://curl.se/docs/CVE-2026-8924.json
generic

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

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

Vendor Advisories for CVE-2026-8924(8)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibcurl4-openssl-dev (7.58.0-2ubuntu3.24+esm9) @ bionic2026-09-23ubuntu
redhatcurl-0:8.12.1-4.el10_2.62026-09-21redhat
redhatpatch2026-08-19redhat
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

(6 across 6 ecosystems)
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 (184 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
curl8.14.1-2 ... 8.23.0~rc2-1+exp1 (84 versions)
  • every version on: no fix on record
—
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 6× in last 7d / 59× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 648 total refreshes for this CVE.

  1. 2026-10-09 20:08 UTCEPSS rescore
  2. 2026-10-08 17:13 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
  4. 2026-10-06 15:18 UTCEPSS rescore
  5. 2026-10-05 17:44 UTCEPSS rescore
  6. 2026-10-04 23:22 UTCEPSS rescore
  7. 2026-10-01 19:51 UTCEPSS rescore
  8. 2026-09-30 15:04 UTCEPSS rescore
  9. 2026-09-28 13:52 UTCEPSS rescore
  10. 2026-09-28 13:52 UTCEPSS rescore
  11. 2026-09-27 13:49 UTCEPSS rescore
  12. 2026-09-26 15:59 UTCEPSS rescore
  13. 2026-09-24 14:04 UTCEPSS rescore
  14. 2026-09-23 17:54 UTCEPSS rescore
  15. 2026-09-23 11:03 UTCVendor advisory
  16. 2026-09-23 11:03 UTCGHSA enrichment
  17. 2026-09-23 06:36 UTCEG score recompute
  18. 2026-09-23 06:36 UTCVendor advisory
  19. 2026-09-23 06:36 UTCGHSA enrichment
  20. 2026-09-22 16:01 UTCEPSS rescore
  21. 2026-09-21 21:09 UTCEPSS rescore
  22. 2026-09-20 20:16 UTCEPSS rescore
  23. 2026-09-18 19:28 UTCEPSS rescore
  24. 2026-09-18 10:12 UTCVendor advisory
  25. 2026-09-18 10:12 UTCGHSA enrichment
Show 75 more
  1. 2026-09-18 06:13 UTCEG score recompute
  2. 2026-09-18 06:13 UTCVendor advisory
  3. 2026-09-18 06:13 UTCGHSA enrichment
  4. 2026-09-17 19:32 UTCEPSS rescore
  5. 2026-09-16 14:09 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-15 07:26 UTCVendor advisory
  8. 2026-09-15 07:26 UTCGHSA enrichment
  9. 2026-09-15 06:39 UTCEG score recompute
  10. 2026-09-15 06:39 UTCVendor advisory
  11. 2026-09-15 06:39 UTCGHSA enrichment
  12. 2026-09-15 03:12 UTCEPSS rescore
  13. 2026-09-14 07:49 UTCVendor advisory
  14. 2026-09-14 07:49 UTCGHSA enrichment
  15. 2026-09-14 03:55 UTCVendor advisory
  16. 2026-09-14 03:55 UTCGHSA enrichment
  17. 2026-09-14 00:05 UTCVendor advisory
  18. 2026-09-14 00:04 UTCGHSA enrichment
  19. 2026-09-13 16:54 UTCEG score recompute
  20. 2026-09-13 16:54 UTCVendor advisory
  21. 2026-09-13 16:54 UTCGHSA enrichment
  22. 2026-09-13 16:48 UTCEPSS rescore
  23. 2026-09-13 12:51 UTCVendor advisory
  24. 2026-09-13 12:51 UTCGHSA enrichment
  25. 2026-09-13 08:57 UTCEG score recompute
  26. 2026-09-13 08:57 UTCVendor advisory
  27. 2026-09-13 08:57 UTCGHSA enrichment
  28. 2026-09-12 15:02 UTCEPSS rescore
  29. 2026-09-12 14:05 UTCEG score recompute
  30. 2026-09-12 14:05 UTCVendor advisory
  31. 2026-09-12 14:05 UTCGHSA enrichment
  32. 2026-09-11 14:53 UTCEPSS rescore
  33. 2026-09-11 09:38 UTCEPSS rescore
  34. 2026-09-10 09:35 UTCEPSS rescore
  35. 2026-09-08 22:01 UTCEPSS rescore
  36. 2026-09-06 14:18 UTCEG score recompute
  37. 2026-09-06 14:18 UTCVendor advisory
  38. 2026-09-06 14:18 UTCGHSA enrichment
  39. 2026-09-06 13:48 UTCEPSS rescore
  40. 2026-09-06 04:52 UTCVendor advisory
  41. 2026-09-06 04:52 UTCGHSA enrichment
  42. 2026-09-05 23:48 UTCEG score recompute
  43. 2026-09-05 23:48 UTCVendor advisory
  44. 2026-09-05 23:48 UTCGHSA enrichment
  45. 2026-09-05 15:31 UTCEPSS rescore
  46. 2026-09-04 05:07 UTCEPSS rescore
  47. 2026-09-02 14:12 UTCEPSS rescore
  48. 2026-09-01 13:54 UTCEPSS rescore
  49. 2026-09-01 04:40 UTCEPSS rescore
  50. 2026-08-31 00:32 UTCVendor advisory
  51. 2026-08-31 00:32 UTCGHSA enrichment
  52. 2026-08-30 20:41 UTCEG score recompute
  53. 2026-08-30 20:41 UTCVendor advisory
  54. 2026-08-30 20:41 UTCGHSA enrichment
  55. 2026-08-30 19:18 UTCEPSS rescore
  56. 2026-08-30 16:50 UTCVendor advisory
  57. 2026-08-30 16:50 UTCGHSA enrichment
  58. 2026-08-30 11:20 UTCEG score recompute
  59. 2026-08-30 11:20 UTCVendor advisory
  60. 2026-08-30 11:20 UTCGHSA enrichment
  61. 2026-08-30 01:22 UTCEPSS rescore
  62. 2026-08-28 21:42 UTCEPSS rescore
  63. 2026-08-28 02:45 UTCVendor advisory
  64. 2026-08-28 02:45 UTCGHSA enrichment
  65. 2026-08-27 22:12 UTCEG score recompute
  66. 2026-08-27 22:12 UTCVendor advisory
  67. 2026-08-27 22:12 UTCGHSA enrichment
  68. 2026-08-27 14:25 UTCEPSS rescore
  69. 2026-08-27 03:17 UTCEG score recompute
  70. 2026-08-27 03:17 UTCVendor advisory
  71. 2026-08-27 03:17 UTCGHSA enrichment
  72. 2026-08-26 14:47 UTCEPSS rescore
  73. 2026-08-25 13:49 UTCEPSS rescore
  74. 2026-08-25 13:38 UTCVendor advisory
  75. 2026-08-25 13:38 UTCGHSA enrichment

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-8924?
CVE-2026-8924 is a critical vulnerability 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 CVE-2026-8924 disclosed?
CVE-2026-8924 was first published on July 3, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
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 (50th 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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