Heap-based Buffer Overflow in libvips Affects Local Applications
CVE-2026-6491

4.8MEDIUM

Key Information:

Vendor

libvips

Status
Libvips
Vendor
CVE Published:
17 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6491?

A security vulnerability exists in the libvips library prior to version 8.19, specifically within the im_minpos_vec function in the deprecated vips7compat.c file. This vulnerability allows for heap-based buffer overflow due to inadequate handling of the argument n, requiring local access for exploitation. Although disclosed publicly, it has raised concerns regarding the integrity of applications utilizing affected versions. The vendor has announced plans to eliminate the deprecated functionality in future releases.

Affected Version(s)

libvips 8.18.0

libvips 8.18.1

libvips 8.18.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-6491 - Proof of Concept

References

https://vuldb.com/vuln/358035
vdb-entrytechnical-description
https://vuldb.com/vuln/358035/cti
signaturepermissions-required
https://vuldb.com/submit/786994
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

biniam (VulDB User)
VulDB CNA Team
.