CVE-2026-77219

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory published 2026-08-21. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

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

GNU Emacs before 31.0.91 contains an integer overflow in the PBM/PPM/PGM image loader that allows an attacker to leak heap memory contents by supplying a crafted image with large dimensions and an elevated max color index. The image loader multiplies image dimensions and channel count using signed integer arithmetic; for sufficiently large values, the result wraps to a negative number, bypassing the bounds check and causing the pixel reader to access heap memory past the end of the allocated buffer. The over-read contents are interpreted as pixel color values and rendered on screen.

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 21, 2026

Last Modified

August 21, 2026

Advisory Details (2)

Auto-updated Aug 21, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

GNU Emacs < 31.0.91 Heap Over-Read via PBM/PPM/PGM Image Loader | Advisories | VulnCheck

https://www.vulncheck.com/advisories/gnu-emacs-heap-over-read-via-pbm-ppm-pgm-image-loader
github_commit

commit b07e634e4cf4 (emacs-mirror/emacs)

Fix landed in emacs-mirror/emacs commit b07e634e4cf4 — awaiting tagged release

https://github.com/emacs-mirror/emacs/commit/b07e634e4cf45162ae0178e32092b040587f2c6c

Vendor Advisories for CVE-2026-77219(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 35× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 23:40 UTCGHSA enrichment
  3. 2026-08-29 12:34 UTCGHSA enrichment
  4. 2026-08-29 01:06 UTCEG score recompute
  5. 2026-08-29 01:05 UTCGHSA enrichment
  6. 2026-08-28 21:42 UTCEPSS rescore
  7. 2026-08-28 09:53 UTCGHSA enrichment
  8. 2026-08-27 22:44 UTCEG score recompute
  9. 2026-08-27 22:44 UTCGHSA enrichment
  10. 2026-08-27 14:25 UTCEPSS rescore
  11. 2026-08-27 11:39 UTCGHSA enrichment
  12. 2026-08-27 00:33 UTCGHSA enrichment
  13. 2026-08-26 13:26 UTCGHSA enrichment
  14. 2026-08-26 02:17 UTCGHSA enrichment
  15. 2026-08-25 15:12 UTCEG score recompute
  16. 2026-08-25 15:12 UTCGHSA enrichment
  17. 2026-08-25 13:49 UTCEPSS rescore
  18. 2026-08-25 04:07 UTCGHSA enrichment
  19. 2026-08-24 17:01 UTCEG score recompute
  20. 2026-08-24 17:01 UTCGHSA enrichment
  21. 2026-08-24 14:18 UTCEPSS rescore
  22. 2026-08-24 05:56 UTCGHSA enrichment
  23. 2026-08-23 18:46 UTCGHSA enrichment
  24. 2026-08-23 07:41 UTCEG score recompute
  25. 2026-08-23 07:41 UTCGHSA enrichment
Show 10 more
  1. 2026-08-23 00:19 UTCEPSS rescore
  2. 2026-08-22 20:36 UTCGHSA enrichment
  3. 2026-08-22 09:31 UTCGHSA enrichment
  4. 2026-08-21 22:25 UTCEG score recompute
  5. 2026-08-21 22:25 UTCGHSA enrichment
  6. 2026-08-21 21:51 UTCEG score recompute
  7. 2026-08-21 21:51 UTCGHSA enrichment
  8. 2026-08-21 21:24 UTCEG score recompute
  9. 2026-08-21 20:34 UTCEG score recompute
  10. 2026-08-21 20:34 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-77219?
CVE-2026-77219 is a high vulnerability published on August 21, 2026. GNU Emacs before 31.0.91 contains an integer overflow in the PBM/PPM/PGM image loader that allows an attacker to leak heap memory contents by supplying a crafted image with large dimensions and an elevated max color index. The image loader multiplies image dimensions and channel count using signed…
When was CVE-2026-77219 disclosed?
CVE-2026-77219 was first published in the National Vulnerability Database on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77219 actively exploited?
CVE-2026-77219 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 97.2% of all scored CVEs.
What is the CVSS score of CVE-2026-77219?
CVE-2026-77219 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-77219?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77219, 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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