CVE-2026-76879

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-20. The CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:gitlab, epss, ghsa
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

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

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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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
0.3%
EPSS %ILE
21st
KEV
Not listed

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 19, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
Patch available.
generic

C12.22 canonical header stack out-of-bounds write before bounds check (#21480) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21480
generic

Wireshark • Go Deep | Wireshark • wnpa-sec-2026-89 C12.22 protocol dissector crash

https://www.wireshark.org/security/wnpa-sec-2026-89.html

Vendor Advisories for CVE-2026-76879(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.0.10-1 ... 4.6.6-2 (50 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.13-0+deb13u1 ... 4.4.9-1 (7 versions)
  • every version up to 4.4.18-0+deb13u1: fixed in 4.4.18-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.7-1 ... 4.6.6-2 (16 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 22× in last 7d / 105× 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 176 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76879?
CVE-2026-76879 is a high vulnerability published on August 19, 2026. C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
When was CVE-2026-76879 disclosed?
CVE-2026-76879 was first published on August 19, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76879 actively exploited?
CVE-2026-76879 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76879?
CVE-2026-76879 has a CVSS base score of 7.5 (the CNA's own assessment, by gitlab; NVD's own analysis pending).
How do I remediate CVE-2026-76879?
A fix for CVE-2026-76879 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-76879 are linked in the Vendor Advisories panel on this page.

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