Quick answers
- Is CVE-2026-18090 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18090 being exploited in the wild.
- How severe is CVE-2026-18090?
- Medium severity, with a CVSS score of 6.1, published 8 September 2026.
- Which products and versions are affected?
- GNOME gdk-pixbuf.
- Is there a fix for CVE-2026-18090?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-18090 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-18090?
- Check whether you run Gnome Gdk-Pixbuf. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a heap out-of-bounds read (CWE-125) in the uncompress() function that decompresses RLE-encoded ICNS icon data. The function fails to properly validate buffer boundaries during decompression, allowing an attacker to read data beyond the allocated heap buffer. Attack requires a local attacker to provide a specially crafted .icns file and requires user interaction (the application or user must open the malicious file). Exploitation results in denial of service (application crash) or information disclosure from adjacent memory regions. The flaw affects gdk-pixbuf's ICNS format handler and patches should be available from the upstream GNOME project.
Affected products
- GNOME gdk-pixbuf
Timeline
- 2026-09-08: disclosed
- 2026-09-08: advisory