CVE-2026-42144

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 96% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 0

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

CImg Library is a C++ library for image processing. Prior to commit 4ca26bc, there is an integer overflow vulnerability in the W*H*D size computation inside _load_pnm() that can bypass the memory allocation guard. A crafted PNM/PGM/PPM file with large dimension values causes the overflow to wrap around, allocating an undersized buffer and potentially triggering a heap buffer overflow. Any application using CImg to load untrusted image files is affected. This issue has been patched via commit 4ca26bc.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

May 4, 2026

Last Modified

May 7, 2026

Advisory Details (4)

Auto-updated May 4, 2026
Patch available. Sources: github.
github Patch Available

Integer overflow in PNM size check bypasses memory guard (_load_pnm) · Advisory · GreycLab/CImg · GitHub

https://github.com/GreycLab/CImg/security/advisories/GHSA-4663-63fm-44gc
generic

Release v.3.7.5 · GreycLab/CImg · GitHub

https://github.com/GreycLab/CImg/releases/tag/v.3.7.5
generic

integer overflow in PNM size check bypasses memory guard (_load_pnm) · Issue #478 · GreycLab/CImg · GitHub

https://github.com/GreycLab/CImg/issues/478
generic

Fix #478. · GreycLab/CImg@4ca26bc · GitHub

https://github.com/GreycLab/CImg/commit/4ca26bce4d8c61fcd1507d5f9401b9fb1222c27d

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
cimg2.9.4+dfsg-2 ... 3.5.2+dfsg-2 (15 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
cimg3.2.1+dfsg-1, 3.2.1+dfsg-2, 3.5.0+dfsg-1, 3.5.2+dfsg-1, 3.5.2+dfsg-2——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
cimg3.5.2+dfsg-13.5.2+dfsg-1+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
cimg3.5.2+dfsg-13.5.2+dfsg-2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 26× 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 146 total refreshes for this CVE.

  1. 2026-09-13 16:47 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2026-42144?
CVE-2026-42144 is a medium vulnerability published on May 4, 2026. CImg Library is a C++ library for image processing. Prior to commit 4ca26bc, there is an integer overflow vulnerability in the WHD size computation inside loadpnm() that can bypass the memory allocation guard. A crafted PNM/PGM/PPM file with large dimension values causes the overflow to wrap…
When was CVE-2026-42144 disclosed?
CVE-2026-42144 was first published in the National Vulnerability Database on May 4, 2026, with the most recent update on May 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42144 actively exploited?
CVE-2026-42144 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 96.2% of all scored CVEs.
What is the CVSS score of CVE-2026-42144?
CVE-2026-42144 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-42144?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42144, 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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