CVE-2026-13705 Memory corruption in Imager
A heap out-of-bounds read in the Imager Perl library allows attackers to crash the application by processing a crafted SGI image.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-13705?
CVE-2026-13705 is a high-severity memory corruption vulnerability in TONYC Imager, published on 6 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Imager versions before 1.032 for Perl have a heap out-of-bounds read in the bundled Imager::File::SGI reader via a 16-bit RLE literal run in read_rgb_16_rle.
read_rgb_16_rle guards each literal run with if (count > data_left), but count is a pixel count while every 16-bit sample consumes two bytes. The copy loop reads inp[0] * 256 + inp[1] and advances two bytes per pixel, so a run with data_left / 2 < count <= data_left passes the guard yet consumes 2 * count bytes and reads past the end of the buffer. The 8-bit path is unaffected because there one pixel is one byte.
Reading a crafted SGI image through Imager->read triggers the over-read before the parser rejects the malformed image, which can crash the process.
Weakness: CWE-125
Which versions are affected by CVE-2026-13705?
How do I fix CVE-2026-13705?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-13705 being exploited?
There is no known exploitation of CVE-2026-13705 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-13705, GHSA-pmgh-mrwc-qw67, UBUNTU-CVE-2026-13705.