CVE-2026-40930
CSIRTS triage
- What
- Chunk smuggling in the push-mode APNG parser via an unconsumed chunk body.
- Who is affected
- Users of libpng.
- Urgency
- Remediation is medium due to the moderate severity and lack of exploitation reports.
- Action
- Update to the latest version of libpng.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all EPSS-scored CVEs.
Advisory coverage (1)
- mediumCVE-2026-40930: LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk bodymsrc · 2026-06-09
External references
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[](https://www.csirts.com/cve/CVE-2026-40930)