CVE-2026-42500

CVE-2026-42500 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Decoding a paletted BMP file with an out-of-range palette index results in a panic when accessing pixels in the invalid image.

Frequently asked questions

What is CVE-2026-42500?
Decoding a paletted BMP file with an out-of-range palette index results in a panic when accessing pixels in the invalid image.
How severe is CVE-2026-42500?
CVE-2026-42500 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-42500 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-42500?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42500 have an EU (EUVD) identifier?
Yes. CVE-2026-42500 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33419.
When was CVE-2026-42500 published?
CVE-2026-42500 was published on 2026-05-29 and last updated on 2026-06-17.

References