CVE-2026-2050: GIMP HDR File Parsing Heap Buffer Overflow Remote Code Execution

Technical summary

The vulnerability exists in GIMP's HDR file parser and stems from insufficient validation of user-supplied data length before copying it into a heap-based buffer (CWE-122: Heap-based Buffer Overflow; CWE-131: Incorrect Calculation of Buffer Size). The parser fails to properly bounds-check data, allowing an attacker to write beyond allocated memory. Successful exploitation grants code execution in the context of the GIMP process with the privileges of the user running the application. The attack vector is local, requires user interaction (opening a malicious file), and does not require elevated privileges.

Business impact

Users who work with HDR images—including photographers, digital artists, and technical professionals—face direct compromise risk if they open untrusted HDR files. Since GIMP runs with user privileges, code execution could lead to lateral movement within a network, data theft, malware installation, or disruption of creative workflows. Organizations with designers or media professionals using GIMP should prioritize remediation to prevent endpoint compromise.

Affected systems

GIMP is vulnerable to this flaw. The exact affected versions are not specified in the available advisory data; verify against the official GIMP security advisory or vendor repository for the full list of impacted releases and patched versions. Users should check their installed GIMP version against vendor guidance to determine exposure.

Exploitability

The vulnerability requires user interaction and local access, making it unsuitable for mass remote exploitation. However, the bar for successful exploitation is low: an attacker need only deliver a malicious HDR file via email, a compromised website, or file sharing. Social engineering is the primary attack vector. Once a user opens the file, arbitrary code execution follows without requiring additional interaction or system misconfiguration. The CVSS 3.1 score of 7.8 (High) reflects the serious consequences (full confidentiality, integrity, and availability impact) tempered by the local, user-interaction requirement.

Remediation

Update GIMP to a patched version released by the GIMP project. Check the official GIMP website or your distribution's security updates for the specific version that addresses CVE-2026-2050. Until patched, users should avoid opening HDR files from untrusted sources. Consider restricting file-opening permissions or sandboxing GIMP in environments handling untrusted media.

Patch guidance

Monitor the GIMP project's official security advisories and release notes for patches addressing this vulnerability. Patches may be released as point updates or minor version increments depending on the maintenance policy. Verify patch availability and version numbers against the vendor advisory before deployment. Test patches in a non-production environment to confirm compatibility with your workflows before broad rollout.

Detection guidance

Monitor for suspicious GIMP process behavior, including unexpected child process spawning, network connections, or file system writes following HDR file processing. Endpoint Detection and Response (EDR) tools can flag anomalous execution patterns post-crash or code injection. File integrity monitoring on directories where GIMP stores plugins or temporary files may detect post-compromise modifications. Network-based detection is limited since the attack is local; focus on behavioral analytics at the endpoint level.

Why prioritize this

This vulnerability merits high priority because it enables arbitrary code execution with moderate exploitability barriers. The user-interaction requirement prevents worm-like propagation, but social engineering is highly practical. Organizations whose staff regularly handle image files or work in media production should prioritize patching. Even one compromised workstation can serve as a beachhead for lateral movement or data exfiltration, making timely patching essential for defense-in-depth.

Risk score, explained

The CVSS 3.1 score of 7.8 reflects a HIGH-severity vulnerability. The attack vector is Local (AV:L), attack complexity is Low (AC:L), no privileges are required (PR:N), and user interaction is required (UI:R). The impact is severe across all three dimensions: Confidentiality, Integrity, and Availability are all High (C:H/I:H/A:H), meaning successful exploitation grants unrestricted code execution. The score appropriately weights the practical constraints (local, user interaction) against the catastrophic impact (arbitrary code execution).

Frequently asked questions