CVE-2026-66036

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-24. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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.

FFmpeg through 8.1.2, fixed in commit 5d7112c, contains a heap out-of-bounds write vulnerability in the vf_hqdn3d filter that allows attackers to corrupt heap memory by supplying a crafted video whose frame resolution increases between frames when filtergraph reinitialization is disabled via the -reinit_filter 0 option. Attackers can provide a malicious video input where vf_hqdn3d.config_input() allocates undersized per-plane line-history buffers based on the initial frame width, and subsequent larger frames cause denoise_spatial() to write beyond the allocation boundary, resulting in heap memory corruption.

CVSS v3
8.8
EG Score
8.8(medium)
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
34%
KEV
Not listed

Published

July 24, 2026

Last Modified

August 7, 2026

Advisory Details (3)

Auto-updated Jul 24, 2026
No patch confirmed yet.
generic

FFmpeg Heap Out-of-Bounds Write in vf_hqdn3d Filter | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ffmpeg-heap-out-of-bounds-write-in-vf-hqdn3d-filter
generic

avfilter/vf_hqdn3d: support dynamic frame sizes · 5d7112c60e - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/5d7112c60e6f0f0742ce47d448e6da0718a70f4c
generic

#23783 - avfilter/vf_hqdn3d: dont crash on parameter changes - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23783

Vendor Advisories for CVE-2026-66036(5)

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 / EcosystemFixed in / PatchReleasedSource
ubuntulibswscale4 (7:3.4.11-0ubuntu0.1+esm13) @ bionic2026-09-15ubuntu
ubuntulibswscale9 (7:8.0.1-3ubuntu2+esm3) @ resolute2026-09-15ubuntu
redhatffmpeg-0:6.1.6-8.el9ai2026-09-10redhat
redhatrhoai/odh-vllm-gaudi-rhel9:17867124642026-09-08redhat
redhatffmpeg-0:6.1.6-7.el9ai2026-08-26redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:4.3.2-0+deb11u2 ... 7:8.1.2-2 (91 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:5.1.3-1 ... 7:9.0.1-1 (59 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:9.0.1-1 (23 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:9.0.1-1 (19 versions)——

Weakness Classification(1)

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

Additional Vendor Advisories

(3)

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 30× in last 7d / 117× 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 220 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-66036?
CVE-2026-66036 is a high vulnerability published on July 24, 2026. FFmpeg through 8.1.2, fixed in commit 5d7112c, contains a heap out-of-bounds write vulnerability in the vfhqdn3d filter that allows attackers to corrupt heap memory by supplying a crafted video whose frame resolution increases between frames when filtergraph reinitialization is disabled via the…
When was CVE-2026-66036 disclosed?
CVE-2026-66036 was first published in the National Vulnerability Database on July 24, 2026, with the most recent update on August 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66036 actively exploited?
CVE-2026-66036 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 66.4% of all scored CVEs.
What is the CVSS score of CVE-2026-66036?
CVE-2026-66036 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-66036?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66036, 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.

Dependency Blast Radius

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