What is CVE-2026-20889?

CVE-2026-20889 is a critical-severity vulnerability in Libraw, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2026-04-07.

How severe is CVE-2026-20889?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Integer overflow in Libraw

CVE-2026-20889

A heap-based buffer overflow vulnerability exists in the x3f_thumb_loader functionality of LibRaw Commit d20315b. A specially crafted malicious file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger th…

Vulnerability class: Integer Overflow

EPSS: 0.001 (23.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Libraw — versions Commit d20315b

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

https://talosintelligence.com/vulnerability_reports/TALOS-2026-2358

Frequently asked questions

What is CVE-2026-20889?: CVE-2026-20889 is a critical-severity vulnerability in Libraw, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2026-04-07.
How severe is CVE-2026-20889?: Critical severity. CVSS v3 base score is 9.8 out of 10.