CVE-2026-78465

HIGHPre-NVD 7.07.0—
EchelonGraph scoreHIGH confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2026-08-24. a secondary CVSS source baseline 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
7.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.0Exploit: Elevated riskExposed: 0

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

A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only. When processing a PCX image file, the plugin calculates memory allocation sizes based on the image dimensions and the number of color planes. If a crafted file sets the number of planes to 4 alongside sufficiently large dimensions, the calculation exceeds the 32-bit integer limit and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when the plugin subsequently writes image data into the undersized buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service.

CVSS v3
7.0
EG Score
7.0(high)
EG Risk
48(Track*)
EG Risk 48/100SSVC: 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
Severity70% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 24, 2026

Last Modified

August 28, 2026

Advisory Details (3)

Auto-updated Aug 24, 2026
🔬 Proof of concept available. Patch available. Sources: redhat.
generic🟡 PoC Available

Integer overflow in PCX loader (planes=4) leads to heap overflow on 32-bit (CWE-190, CWE-787) (#16578) · Issues · GNOME / GIMP · GitLab

https://gitlab.gnome.org/GNOME/gimp/-/work_items/16578
redhat

2522057 – (CVE-2026-78465) CVE-2026-78465 gimp: integer overflow in PCX loader (planes=4) leads to heap overflow on 32-bit

https://bugzilla.redhat.com/show_bug.cgi?id=2522057
redhat Patch Available

CVE-2026-78465 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-78465

Vendor Advisories for CVE-2026-78465(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 28× in last 7d / 28× 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 22:33 UTCGHSA enrichment
  3. 2026-08-29 10:00 UTCEG score recompute
  4. 2026-08-29 10:00 UTCGHSA enrichment
  5. 2026-08-28 21:42 UTCEPSS rescore
  6. 2026-08-28 21:25 UTCGHSA enrichment
  7. 2026-08-28 19:25 UTCGHSA enrichment
  8. 2026-08-28 06:49 UTCGHSA enrichment
  9. 2026-08-27 18:14 UTCEG score recompute
  10. 2026-08-27 18:14 UTCGHSA enrichment
  11. 2026-08-27 14:25 UTCEPSS rescore
  12. 2026-08-27 04:10 UTCGHSA enrichment
  13. 2026-08-26 15:29 UTCEG score recompute
  14. 2026-08-26 15:29 UTCGHSA enrichment
  15. 2026-08-26 14:47 UTCEPSS rescore
  16. 2026-08-26 02:55 UTCGHSA enrichment
  17. 2026-08-25 14:21 UTCEG score recompute
  18. 2026-08-25 14:21 UTCGHSA enrichment
  19. 2026-08-25 14:00 UTCEG score recompute
  20. 2026-08-25 14:00 UTCGHSA enrichment
  21. 2026-08-25 13:49 UTCEPSS rescore
  22. 2026-08-25 06:57 UTCEG score recompute
  23. 2026-08-25 06:57 UTCGHSA enrichment
  24. 2026-08-24 18:23 UTCEG score recompute
  25. 2026-08-24 18:16 UTCEG score recompute
Show 3 more
  1. 2026-08-24 17:18 UTCEG score recompute
  2. 2026-08-24 16:33 UTCEG score recompute
  3. 2026-08-24 16:31 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-78465?
CVE-2026-78465 is a high vulnerability published on August 24, 2026. A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only. When processing a PCX image file, the plugin calculates memory allocation sizes based on the image dimensions and the number of color planes. If a crafted file sets the number of planes to 4 alongside sufficiently large…
When was CVE-2026-78465 disclosed?
CVE-2026-78465 was first published in the National Vulnerability Database on August 24, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78465 actively exploited?
CVE-2026-78465 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 96.6% of all scored CVEs.
What is the CVSS score of CVE-2026-78465?
CVE-2026-78465 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2026-78465?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78465, 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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