CVE-2026-56208

HIGHPre-NVD 7.67.6—
EchelonGraph scoreHIGH confidence

Score 7.6 from GitHub Security Advisory (severity: HIGH) published 2026-06-19. a secondary CVSS source baseline 7.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.6Exploit: NoneExposed: 0

A fix is available — apply it.

A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when g_lag_in_frames is set to 1 or higher. This results in a 232-byte out-of-bounds write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a denial of service (process crash) or potentially achieve code execution.

CVSS v3
7.6
EG Score
7.6(high)
EPSS
19.6%
KEV
Not listed

Published

June 19, 2026

Last Modified

July 22, 2026

Advisory Details (4)

Auto-updated Jun 22, 2026
Patch available. Sources: redhat.
generic

Chromium

https://issues.chromium.org/issues/504317456
redhat

2490799 – (CVE-2026-56208) CVE-2026-56208 libaom: libaom: heap buffer overflow in AV1 encoder first-pass stats buffer via LAP mode

https://bugzilla.redhat.com/show_bug.cgi?id=2490799
generic

243f8ae84b - aom - Git at Google

https://aomedia.googlesource.com/aom/+/243f8ae84b
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-56208

Vendor Advisories for CVE-2026-56208(3)

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
redhataom-main-3.14.0-0.1.hum12026-06-28redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 125× 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 132 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-56208?
CVE-2026-56208 is a high vulnerability published on June 19, 2026. A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when glagin_frames is set to 1 or higher. This results in a…
When was CVE-2026-56208 disclosed?
CVE-2026-56208 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56208 actively exploited?
CVE-2026-56208 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56208?
CVE-2026-56208 has a CVSS v3 base score of 7.6 (NVD).
How do I remediate CVE-2026-56208?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56208, 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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