CVE-2026-83596

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-31. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to improper memory handling.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

August 31, 2026

Last Modified

September 22, 2026

Advisory Details (3)

Auto-updated Aug 31, 2026
Patch available. Sources: redhat.
redhat

2526490 – (CVE-2026-83596) CVE-2026-83596 webkitgtk: Validate the full FeatureList array once in OpenTypeVerticalData findFeature

https://bugzilla.redhat.com/show_bug.cgi?id=2526490
generic

322969 – Validate the full FeatureList array once in OpenTypeVerticalData findFeature

https://bugs.webkit.org/show_bug.cgi?id=322969
redhat Patch Available

CVE-2026-83596 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initia

https://access.redhat.com/security/cve/CVE-2026-83596

Vendor Advisories for CVE-2026-83596(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatwebkit2gtk3-0:2.54.0-1.el9_82026-09-21redhat

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 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.40.1-1 ... 2.53.92-1 (166 versions)——
wpewebkit2.38.6-1 ... 2.52.6-1 (54 versions)——
Debian:13(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.48.3-1 ... 2.53.92-1 (59 versions)——
wpewebkit2.48.3-1 ... 2.52.6-1 (20 versions)——
Debian:14(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.48.3-1 ... 2.53.92-1 (59 versions)——
wpewebkit2.48.3-1 ... 2.52.6-1 (20 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 41× in last 7d / 113× 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 113 total refreshes for this CVE.

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

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

Frequently asked(5)

What is CVE-2026-83596?
CVE-2026-83596 is a high vulnerability published on August 31, 2026. A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to improper memory handling.
When was CVE-2026-83596 disclosed?
CVE-2026-83596 was first published in the National Vulnerability Database on August 31, 2026, with the most recent update on September 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-83596 actively exploited?
CVE-2026-83596 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.5% of all scored CVEs.
What is the CVSS score of CVE-2026-83596?
CVE-2026-83596 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-83596?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-83596, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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