CVE-2026-70631

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-08-07. a secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

FFmpeg versions from 0.5 up to, but not including, 9.0 contain an uninitialized heap memory disclosure vulnerability in the native TIFF decoder in libavcodec/tiff.c. An attacker who can cause FFmpeg to decode a crafted TIFF file can supply a valid Deflate-compressed strip that terminates successfully after producing fewer bytes than the declared strip requires. The tiff_unpack_zlib() function allocates a heap buffer sized for the full declared strip but copies all declared rows via memcpy() regardless of how many bytes zlib actually decompressed, causing unwritten bytes that can contain stale data from prior heap allocations to be incorporated into decoded image output and potentially exposing sensitive data in persistent services.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 6, 2026

Last Modified

September 1, 2026

Advisory Details (4)

Auto-updated Aug 6, 2026
No patch confirmed yet.
generic

#23899 - avcodec/tiff: reject inflate output shorter than the strip - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23899
generic

TIFF decoder · a991b1fecb - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/a991b1fecbd8c9e6f4fc31c191bd12e4be27dbf7
generic

avcodec/tiff: reject inflate output shorter than the strip · 3c287af3af - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/3c287af3affe1286350faa69c02bcc5d49de18bb
generic

avcodec/tiff: reject inflate output shorter than the strip · 2f234ea34c - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/2f234ea34c81288e3840fca632dd16481d8de39f

Vendor Advisories for CVE-2026-70631(1)

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
ubuntulibswscale5 (7:4.2.7-0ubuntu0.1+esm17) @ focal2026-09-19ubuntu

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 ... 7:9.0-1 (92 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.

All Vendor Advisories

(1)

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 20× in last 7d / 73× 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 122 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-70631?
CVE-2026-70631 is a medium vulnerability published on August 6, 2026. FFmpeg versions from 0.5 up to, but not including, 9.0 contain an uninitialized heap memory disclosure vulnerability in the native TIFF decoder in libavcodec/tiff.c. An attacker who can cause FFmpeg to decode a crafted TIFF file can supply a valid Deflate-compressed strip that terminates…
When was CVE-2026-70631 disclosed?
CVE-2026-70631 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70631 actively exploited?
CVE-2026-70631 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 96.9% of all scored CVEs.
What is the CVSS score of CVE-2026-70631?
CVE-2026-70631 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-70631?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70631, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-70631

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