Buffer overflow in Libvips
CVE-2026-6491
A security vulnerability has been detected in libvips up to 8.18.2. The affected element is the function im_minpos_vec of the file libvips/deprecated/vips7compat.c of the component nip2 Handler. Such manipulation of the argument n leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed publicly and may be used. The vendor confirms that they will "be removing the deprecated area in libvips 8.19".
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (5.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Libvips — versions 8.18.0, 8.18.1, 8.18.2
Weakness classification (CWE)
References
- vuldb.com/vuln/358035 (technical-description, vdb-entry)
- vuldb.com/vuln/358035/cti (signature, permissions-required)
- vuldb.com/submit/786994 (third-party-advisory)
- github.com/libvips/libvips/issues/4965 (issue-tracking)
- github.com/libvips/libvips/issues/4965 (issue-tracking)
- github.com/biniamf/pocs/tree/main/libvips_im_minpos_vec_oob (exploit)
- github.com/libvips/libvips/ (product)
Frequently asked questions
- What is CVE-2026-6491?
- CVE-2026-6491 is a medium-severity vulnerability in Libvips, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-04-17.
- How severe is CVE-2026-6491?
- Medium severity. CVSS v3 base score is 5.3 out of 10.