CVE-2026-70630

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 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read vulnerability in the native Screenpresso decoder (libavcodec/screenpresso.c) that allows attackers to recover sensitive memory contents by supplying a crafted SPV1 packet with a valid zlib stream that decompresses fewer bytes than the full frame requires. The screenpresso_decode_frame() function fails to validate the produced byte count before calling av_image_copy_plane() to copy the complete frame dimensions from the persistent ctx->inflated_buf buffer, causing unwritten heap memory from prior allocations or prior frames to be copied into decoded output and potentially exposing sensitive data such as userspace addresses from persistent decoding 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

#23896 - avcodec/screenpresso: reject deflate output shorter than the frame - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23896
generic

avcodec/screenpresso: reject deflate output shorter than the frame · c22667d0fd - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/c22667d0fd7916a33fd3e79685b7246fc48f1a62
generic

Screenpresso SPV1 decoder · 9a3202a98b - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/9a3202a98b2e095b54dd784c3e01a09a676fc3fa
generic

avcodec/screenpresso: reject deflate output shorter than the frame · 7058900614 - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/705890061467ad550ecc1dad5eea07f28ccfb43e

Vendor Advisories for CVE-2026-70630(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 22× in last 7d / 81× 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 126 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-70630?
CVE-2026-70630 is a medium vulnerability published on August 6, 2026. FFmpeg versions from 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read vulnerability in the native Screenpresso decoder (libavcodec/screenpresso.c) that allows attackers to recover sensitive memory contents by supplying a crafted SPV1 packet with a valid zlib stream that…
When was CVE-2026-70630 disclosed?
CVE-2026-70630 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-2026-70630 actively exploited?
CVE-2026-70630 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 97.1% of all scored CVEs.
What is the CVSS score of CVE-2026-70630?
CVE-2026-70630 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-70630?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70630, 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-2026-70630

Explore →

Is Your Infrastructure Affected by CVE-2026-70630?

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

Start Free Scan →Browse All CVEs