Heap Overflow in GIMP HDR File Parsing (CVE‑2026‑2049) Enables Remote Code Execution
What It Is – A heap‑based buffer overflow exists in the HDR image parser of the open‑source graphics editor GIMP. Crafted HDR files can overwrite heap memory, allowing an attacker to execute arbitrary code in the context of the GIMP process.
Exploitability – The vulnerability scores 7.8 (CVSS 3.1) with a vector of AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Exploitation requires a victim to open or preview a malicious HDR file (user‑interaction), but proof‑of‑concept code has been released and the flaw is actively being weaponised in targeted phishing campaigns.
Affected Products – GIMP (all versions prior to the March 2026 security update).
TPRM Impact –
- Organizations that embed GIMP in internal design pipelines, SaaS image‑processing services, or automated content‑generation workflows may be compromised through a single malicious image.
- The open‑source nature of GIMP means the vulnerability can propagate across a wide supply chain, affecting any third‑party that redistributes the binary or links against its libraries.
Recommended Actions –
- Deploy the GIMP security update (released March 2026) across all endpoints and servers.
- If HDR support is not required, disable HDR handling via configuration or block HDR file extensions through content‑filtering gateways.
- Conduct user‑awareness training to discourage opening image files from untrusted sources.
- Monitor process creation and memory‑execution events on systems running GIMP for anomalous behavior.
- Review any internal pipelines that automatically process user‑supplied images and add validation for file type and size.