CVE-2026-54627 SAIL: Heap out-of-bounds write in SAIL PSD decoder (Bitmap mode ignores depth)
A heap out-of-bounds write in the SAIL image library allows attackers to execute code or crash applications via crafted PSD 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-2026-54627?
CVE-2026-54627 is a critical memory corruption vulnerability in HappySeaFox sail, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SAIL is a cross-platform library for loading and saving images with support for animation, metadata, and ICC profiles. In 0.9.10 and earlier, psd_private_sail_pixel_format() in src/sail-codecs/psd/helpers.c resolves a one-channel PSD in Bitmap color mode to SAIL_PIXEL_FORMAT_BPP1_INDEXED without requiring the file depth to be one, so the pixel buffer uses one-bit rows while sail_codec_load_frame_v8_psd() in src/sail-codecs/psd/psd.c accepts depth == 8 and writes one attacker-controlled byte per pixel. Loading a crafted PSD through sail_load_from_file() or sail_load_from_memory() therefore writes beyond each heap row, causing memory corruption, a reliable crash, or potential code execution. This mode/depth mismatch is distinct from GHSA-rcqx-gc76-r9mv and GHSA-wcj8-hxxf-pq2c. This issue is fixed in version 1.0.0.
Which versions are affected by CVE-2026-54627?
How do I fix CVE-2026-54627?
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-2026-54627 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54627 exists.
Sources
Also known as DEBIAN-CVE-2026-54627, GHSA-ccqf-rv86-h3wm, UBUNTU-CVE-2026-54627.