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 — 4 sources updated 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
ubuntulibswscale-ffmpeg3 (7:2.8.17-0ubuntu0.1+esm15) @ xenial2026-09-18ubuntu
ubuntulibswscale9 (7:8.0.1-3ubuntu2+esm3) @ resolute2026-09-18ubuntu
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 / 119× 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 235 total refreshes for this CVE.

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

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 65.9% 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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