CVE-2026-70628

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-54160 (ENISA EUVD) · GHSA-qw9h-2hhv-hpfr (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • 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 35/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
3rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 6, 2026

Last Modified

September 1, 2026

Advisory Details (4)

Auto-updated Aug 6, 2026
Patch available.
Web page

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

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/02fc47e13f903768b75f7985a2706a6223ab4506
Web page

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

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/93f2a525ec6c7b467bae68322720d10188fc6e30
Web page

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

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/c6ec28b18cd1eb7d39e6163137367f2d1c62aa7c
Web page

#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
ubuntulibswscale9 (7:8.0.1-3ubuntu2+esm3) @ resolute2026-10-27ubuntu
ubuntulibswscale-ffmpeg3 (7:2.8.17-0ubuntu0.1+esm16) @ xenial2026-10-27ubuntu

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 10× in last 7d / 54× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 306 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 206 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-10-27 19:56 UTCEG score recompute
  7. 2026-10-27 19:56 UTCVendor advisory
  8. 2026-10-27 19:56 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  12. 2026-10-25 14:08 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-10-20 08:55 UTCEG score recompute
  19. 2026-10-20 08:55 UTCVendor advisory
  20. 2026-10-20 08:55 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  21. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-10-18 03:18 UTCEG score recompute
  24. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  25. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
Show 75 more
  1. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-10-13 08:57 UTCEG score recompute
  5. 2026-10-13 08:57 UTCVendor advisory
  6. 2026-10-13 08:57 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  7. 2026-10-12 15:43 UTCEG score recompute
  8. 2026-10-11 19:29 UTCEG score recompute
  9. 2026-10-11 16:44 UTCEG score recompute
  10. 2026-10-11 14:04 UTCEG score recompute
  11. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  12. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-06 23:22 UTCEG score recompute
  16. 2026-10-06 23:22 UTCVendor advisory
  17. 2026-10-06 23:22 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  18. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-10-05 18:35 UTCEG score recompute
  20. 2026-10-05 18:35 UTCVendor advisory
  21. 2026-10-05 18:34 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  22. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-10-04 23:14 UTCVendor advisory
  25. 2026-10-04 23:14 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  26. 2026-10-04 05:47 UTCEG score recompute
  27. 2026-10-04 05:47 UTCVendor advisory
  28. 2026-10-04 05:47 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  29. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  30. 2026-10-03 01:02 UTCEG score recompute
  31. 2026-10-03 01:02 UTCVendor advisory
  32. 2026-10-03 01:02 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  33. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  34. 2026-10-02 09:36 UTCEG score recompute
  35. 2026-10-02 09:36 UTCVendor advisory
  36. 2026-10-02 09:36 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  37. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  38. 2026-10-01 10:57 UTCVendor advisory
  39. 2026-10-01 10:57 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  40. 2026-09-30 22:59 UTCEG score recompute
  41. 2026-09-30 22:59 UTCVendor advisory
  42. 2026-09-30 22:59 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  43. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  44. 2026-09-29 05:51 UTCEG score recompute
  45. 2026-09-29 05:51 UTCVendor advisory
  46. 2026-09-29 05:51 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  47. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  48. 2026-09-28 05:24 UTCVendor advisory
  49. 2026-09-28 05:24 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  50. 2026-09-27 17:26 UTCEG score recompute
  51. 2026-09-27 17:26 UTCVendor advisory
  52. 2026-09-27 17:26 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  53. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  54. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  55. 2026-09-25 04:19 UTCEG score recompute
  56. 2026-09-25 04:19 UTCVendor advisory
  57. 2026-09-25 04:19 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  58. 2026-09-24 01:46 UTCEG score recompute
  59. 2026-09-24 01:46 UTCVendor advisory
  60. 2026-09-24 01:46 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  61. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  62. 2026-09-23 13:48 UTCVendor advisory
  63. 2026-09-23 13:48 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  64. 2026-09-23 00:51 UTCEG score recompute
  65. 2026-09-23 00:51 UTCVendor advisory
  66. 2026-09-23 00:51 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  67. 2026-09-22 12:53 UTCVendor advisory
  68. 2026-09-22 12:52 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  69. 2026-09-22 00:54 UTCEG score recompute
  70. 2026-09-22 00:54 UTCVendor advisory
  71. 2026-09-22 00:54 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  72. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  73. 2026-09-21 12:24 UTCVendor advisory
  74. 2026-09-21 12:24 UTCGHSA enrichmentGHSA-qw9h-2hhv-hpfr · GitHub severity HIGH · GitHub CVSS 7.8
  75. 2026-09-20 20:34 UTCEG score recompute

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-70628?
CVE-2026-70628 is a high-severity vulnerability; its CVE record was 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/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…
When was CVE-2026-70628 made public?
CVE-2026-70628 was made public on July 24, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 6, 2026. EchelonGraph's copy of the record carries a last-modified date of September 1, 2026; the record at its source may have been updated since.
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.

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