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: 0.1%CVSS: 7.8Exploit: None knownExposed services: Not assessed

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
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
3rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 6, 2026

Last Modified

September 1, 2026

Advisory Details (4)

Auto-updated Aug 6, 2026
Patch available.
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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibswscale5 (7:4.2.7-0ubuntu0.1+esm15) @ focal2026-10-04ubuntu
ubuntulibswscale9 (7:8.0.1-3ubuntu2+esm3) @ resolute2026-10-04ubuntu

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 rangeFix by version rangeDependents
ffmpeg7:4.3.2-0+deb11u2 ... 7:9.0-1 (92 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
ffmpeg7:5.1.3-1 ... 7:9.0.2-1 (60 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ffmpeg7:7.1.1-1 ... 7:9.0.2-1 (24 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ffmpeg7:7.1.1-1 ... 7:9.0.1-1 (19 versions)
  • every version up to 7:9.0.2-1: fixed in 7:9.0.2-1
—

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 / 128× 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 259 total refreshes for this CVE.

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

Related CVEs(same product + 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 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 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70628?
CVE-2026-70628 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-70628?
A fix for CVE-2026-70628 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70628 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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