Heap-based Buffer Overflow in GIMP HDR Parsing (CVE‑2026‑2050) Enables Remote Code Execution

Heap-based Buffer Overflow in GIMP HDR Parsing (CVE‑2026‑2050) Enables Remote Code Execution

What It Is — A heap‑based buffer overflow exists in GIMP’s handling of HDR image files. Improper length validation allows crafted HDR data to overwrite heap memory, leading to arbitrary code execution.

Exploitability — Remote attackers can trigger the flaw by convincing a user to open a malicious HDR file or visit a page that forces the file to be loaded. A proof‑of‑concept exists; CVSS 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

Affected Products — GIMP (all versions prior to the April 2026 security update).

TPRM Impact —

• Organizations that embed GIMP in internal workflows (e.g., marketing, design, documentation) may expose endpoints to RCE.
• Compromise of a workstation can serve as a foothold for lateral movement into broader corporate networks, affecting third‑party risk assessments.

Recommended Actions —

1. Deploy the GIMP patch released in April 2026 immediately.
2. Verify all endpoints run the patched version (≥ 2.10.34).
3. Block or sandbox HDR file handling where not required.
4. Monitor process creation and memory‑corruption alerts on systems with GIMP installed.
5. Update third‑party risk registers to reflect the new vulnerability status.

Source: Zero Day Initiative Advisory ZDI‑26‑282