What is CVE-2025-61146?

CVE-2025-61146 is a medium-severity vulnerability in Saitoha Libsixel, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 4.0/10. Published 2026-02-23.

How severe is CVE-2025-61146?

Medium severity. CVSS v3 base score is 4.0 out of 10.

Vulnerability in Saitoha Libsixel

CVE-2025-61146

saitoha libsixel until v1.8.7 was discovered to contain a memory leak via the component malloc_stub.c.

Published 2026-02-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.001 (1.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Saitoha Libsixel

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

github.com/saitoha/libsixel/issues/207 (Issue Tracking, Vendor Advisory)
github.com/saitoha/libsixel/commit/e0ba6685262a3679cc5b9009c0c5b7dc8a3f262e (Patch)
gist.github.com/optionGo/1100e5be05c5558501a95f5e99160584 (Third Party Advisory)

Frequently asked questions

What is CVE-2025-61146?: CVE-2025-61146 is a medium-severity vulnerability in Saitoha Libsixel, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 4.0/10. Published 2026-02-23.
How severe is CVE-2025-61146?: Medium severity. CVSS v3 base score is 4.0 out of 10.