CVE-2026-70628

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-07. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

FFmpeg versions from 0.5 up to, but not including, 9.0 contain a signed integer overflow vulnerability in the DVB subtitle parser in libavcodec/dvbsub_parser.c that allows attackers to trigger a heap buffer overflow by supplying a crafted WTV file. The overflow causes the bounds-check guard expression to wrap to INT_MIN, bypassing the PARSE_BUF_SIZE comparison and invoking memcpy() with attacker-controlled data into a heap buffer, resulting in an out-of-bounds heap write and potential memory corruption or code execution.

CVSS v3
7.8
EG Score
7.8(high)
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
5%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 14, 2026

Advisory Details (4)

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

avcodec/dvbsub_parser: avoid signed overflow in the capacity check · 02fc47e13f - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/02fc47e13f903768b75f7985a2706a6223ab4506
generic

avcodec/dvbsub_parser: avoid signed overflow in the capacity check · 93f2a525ec - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/93f2a525ec6c7b467bae68322720d10188fc6e30
generic

DVB subtitle decoder by (Ian Caulfield: imc25, cam ac uk) · c6ec28b18c - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/c6ec28b18cd1eb7d39e6163137367f2d1c62aa7c
generic

#23897 - avcodec/dvbsub_parser: avoid signed overflow in the capacity check - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23897

Vendor Advisories for CVE-2026-70628(1)

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

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 (58 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:9.0-1 (22 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:9.0-1 (18 versions)——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 31× in last 7d / 64× 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.

  1. 2026-08-21 06:43 UTCEG score recompute
  2. 2026-08-21 06:43 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 18:45 UTCGHSA enrichment
  5. 2026-08-20 06:47 UTCGHSA enrichment
  6. 2026-08-19 18:49 UTCEG score recompute
  7. 2026-08-19 18:48 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 05:51 UTCGHSA enrichment
  10. 2026-08-18 17:53 UTCEG score recompute
  11. 2026-08-18 17:52 UTCGHSA enrichment
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 04:57 UTCGHSA enrichment
  15. 2026-08-17 16:59 UTCEG score recompute
  16. 2026-08-17 16:59 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 05:01 UTCGHSA enrichment
  19. 2026-08-16 17:03 UTCEG score recompute
  20. 2026-08-16 17:03 UTCGHSA enrichment
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 05:05 UTCEG score recompute
  24. 2026-08-16 05:05 UTCGHSA enrichment
  25. 2026-08-16 02:15 UTCEPSS rescore
Show 39 more
  1. 2026-08-15 17:07 UTCGHSA enrichment
  2. 2026-08-15 05:09 UTCEG score recompute
  3. 2026-08-15 05:09 UTCGHSA enrichment
  4. 2026-08-15 01:31 UTCEPSS rescore
  5. 2026-08-14 17:10 UTCEG score recompute
  6. 2026-08-14 17:10 UTCGHSA enrichment
  7. 2026-08-14 06:12 UTCEG score recompute
  8. 2026-08-14 06:12 UTCGHSA enrichment
  9. 2026-08-13 22:00 UTCEPSS rescore
  10. 2026-08-13 18:14 UTCGHSA enrichment
  11. 2026-08-13 06:16 UTCGHSA enrichment
  12. 2026-08-12 18:17 UTCEG score recompute
  13. 2026-08-12 18:17 UTCGHSA enrichment
  14. 2026-08-12 13:51 UTCEPSS rescore
  15. 2026-08-12 06:13 UTCGHSA enrichment
  16. 2026-08-11 18:15 UTCEG score recompute
  17. 2026-08-11 18:15 UTCGHSA enrichment
  18. 2026-08-11 06:16 UTCEG score recompute
  19. 2026-08-11 06:16 UTCGHSA enrichment
  20. 2026-08-11 00:00 UTCEPSS rescore
  21. 2026-08-10 18:18 UTCGHSA enrichment
  22. 2026-08-10 06:17 UTCGHSA enrichment
  23. 2026-08-09 18:19 UTCEG score recompute
  24. 2026-08-09 18:19 UTCGHSA enrichment
  25. 2026-08-09 13:47 UTCEPSS rescore
  26. 2026-08-09 06:21 UTCGHSA enrichment
  27. 2026-08-08 18:23 UTCEG score recompute
  28. 2026-08-08 18:23 UTCGHSA enrichment
  29. 2026-08-08 16:37 UTCEPSS rescore
  30. 2026-08-08 06:25 UTCGHSA enrichment
  31. 2026-08-07 18:27 UTCEG score recompute
  32. 2026-08-07 18:27 UTCGHSA enrichment
  33. 2026-08-07 17:27 UTCEG score recompute
  34. 2026-08-07 17:27 UTCGHSA enrichment
  35. 2026-08-07 10:36 UTCEG score recompute
  36. 2026-08-07 10:36 UTCGHSA enrichment
  37. 2026-08-06 22:38 UTCEG score recompute
  38. 2026-08-06 22:15 UTCEG score recompute
  39. 2026-08-06 22:15 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-70628?
CVE-2026-70628 is a high vulnerability published on August 6, 2026. FFmpeg versions from 0.5 up to, but not including, 9.0 contain a signed integer overflow vulnerability in the DVB subtitle parser in libavcodec/dvbsubparser.c that allows attackers to trigger a heap buffer overflow by supplying a crafted WTV file. The overflow causes the bounds-check guard…
When was CVE-2026-70628 disclosed?
CVE-2026-70628 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70628 actively exploited?
CVE-2026-70628 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 95.3% of all scored CVEs.
What is the CVSS score of CVE-2026-70628?
CVE-2026-70628 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-70628?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70628, 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-2026-70628

Explore →

Is Your Infrastructure Affected by CVE-2026-70628?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs