CVE-2026-8669 Imager versions through 1.030 for Perl allow a heap out of bounds (OOB) write on crafted multi-frame GIF files
A heap out-of-bounds write in the Perl Imager library allows attackers to execute arbitrary code or cause denial of service via crafted multi-frame GIF files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-8669?
CVE-2026-8669 is a medium-severity memory corruption vulnerability in TONYC Imager, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Imager versions through 1.030 for Perl allow a heap out of bounds (OOB) write on crafted multi-frame GIF files.
Imager::File::GIF's i_readgif_multi_low allocates a single per-row buffer GifRow sized for the GIF's global screen width 'SWidth' and reuses it across every image in the file.
The page-match branch validates Image.Width + Image.Left > SWidth before each DGifGetLine write, but the parallel skip-image branch at imgif.c:790-805 calls DGifGetLine(GifFile, GifRow, Width) with no such check.
Weakness: CWE-787
Which versions are affected by CVE-2026-8669?
How do I fix CVE-2026-8669?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-8669 being exploited?
There is no known exploitation of CVE-2026-8669 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-8669, GHSA-6275-mpwc-pq3g, MGASA-2026-0154, UBUNTU-CVE-2026-8669.