CVE-2026-65704

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-23. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

FFmpeg through 8.1.2 contains an out-of-bounds write vulnerability that allows attackers to cause heap corruption by supplying a crafted ffconcat file processed with the -safe 0 flag. The TY demuxer's demux_audio() function decrements packet size without bounds checking, producing a negative size value that is passed to memcpy() in shorten_decode_frame(), where conversion to size_t wraps the value to near SIZE_MAX and triggers reads beyond the source allocation and writes far beyond the Shorten decoder's bitstream buffer.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

July 23, 2026

Last Modified

August 7, 2026

Advisory Details (3)

Auto-updated Jul 23, 2026
No patch confirmed yet.
generic

FFmpeg 8.1.2 Out-of-Bounds Write via TY Demuxer and Shorten Decoder | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-write-via-ty-demuxer-and-shorten-decoder
generic

avformat/ty: don't let the Series2 AC3 trim underflow the packet size · de771bd527 - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/de771bd52774a52d45b0e2c82e56995a1ef40df7
generic

#23767 - avformat/ty: don't let the Series2 AC3 trim underflow the packet size - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23767

Vendor Advisories for CVE-2026-65704(1)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibswscale7 (7:6.1.1-3ubuntu5+esm13) @ noble2026-09-14ubuntu
ubuntulibswscale9 (7:8.0.1-3ubuntu2+esm4) @ resolute2026-09-14ubuntu

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(2)

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

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 24× in last 7d / 94× 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 187 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-65704?
CVE-2026-65704 is a high vulnerability published on July 23, 2026. FFmpeg through 8.1.2 contains an out-of-bounds write vulnerability that allows attackers to cause heap corruption by supplying a crafted ffconcat file processed with the -safe 0 flag. The TY demuxer's demuxaudio() function decrements packet size without bounds checking, producing a negative size…
When was CVE-2026-65704 disclosed?
CVE-2026-65704 was first published in the National Vulnerability Database on July 23, 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-2026-65704 actively exploited?
CVE-2026-65704 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 98.0% of all scored CVEs.
What is the CVSS score of CVE-2026-65704?
CVE-2026-65704 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-65704?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65704, 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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