Heap Overflow in GIMP (CVE‑2026‑2046) Enables Remote Code Execution via Malicious LBM Files
What It Is – A heap‑based buffer overflow in GIMP’s LBM file parser (CVE‑2026‑2046) allows an attacker to execute arbitrary code after a user opens or previews a crafted LBM image. The flaw stems from missing length checks before copying data to a heap buffer.
Exploitability – The vulnerability is rated CVSS 7.8 (High). Exploits require user interaction (opening or previewing a malicious file) but can be weaponised in phishing campaigns or malicious web pages. No public exploit code has been released, but proof‑of‑concept code is available to trusted researchers.
Affected Products – GIMP (all versions prior to the March 2026 security update).
TPRM Impact –
- Many enterprises embed GIMP in internal design pipelines, SaaS image‑processing services, and content‑creation workflows; a compromised workstation can become a foothold for lateral movement.
- Third‑party vendors that ship GIMP‑based utilities expose their customers to the same RCE risk, creating a supply‑chain vector.
Recommended Actions –
- Deploy the March 2026 GIMP patch immediately on all endpoints.
- Block or restrict the LBM file type via endpoint policies or DLP controls.
- Enforce application‑whitelisting to prevent unapproved binaries from executing.
- Conduct user awareness training on opening unknown image files.
- Monitor endpoint logs for crashes or anomalous process launches linked to
gimp.exe.