CVE-2026-101205 FastStone Image Viewer PCX Decoder out-of-bounds
An out-of-bounds read in the PCX decoder allows remote attackers to cause denial of service or disclose information via a malicious image file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-101205?
CVE-2026-101205 is a medium-severity memory corruption vulnerability in FastStone Image Viewer, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A vulnerability was determined in FastStone Image Viewer up to 8.3. This impacts an unknown function of the component PCX Decoder. This manipulation causes out-of-bounds read. The attack may be initiated remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-101205?
How do I fix CVE-2026-101205?
No fix has been published for CVE-2026-101205 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-101205 being exploited?
There is no known exploitation of CVE-2026-101205 in the wild and no public exploit code.
Sources
Also known as GHSA-pfm3-9fm2-9vx6.