CVE-2026-70628

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-07. 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 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(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
4%
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

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.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibswscale9 (7:8.0.1-3ubuntu2+esm3) @ resolute2026-09-20ubuntu
ubuntulibswscale-ffmpeg3 (7:2.8.17-0ubuntu0.1+esm16) @ xenial2026-09-20ubuntu

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(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 34× in last 7d / 139× 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 203 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 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-2026-70628 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 95.8% of all scored CVEs.
What is the CVSS score of CVE-2026-70628?
CVE-2026-70628 has a CVSS v3 base score of 7.8 (NVD).
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

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