CVE-2026-11526: GD versions before 2.86 for Perl allow OS command injection and file overwrite via a 2-arg open() of filename arguments in _make_filehandle
CSIRTS triage
- What
- OS command injection and file overwrite can occur via a 2-arg open() of filename arguments in _make_filehandle.
- Who is affected
- Deployments using GD versions before 2.86 are affected.
- Urgency
- Remediation is necessary due to medium severity, with no current exploitation reported.
- Action
- Upgrade to GD version 2.86 or later.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-11526
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Moderate exploitation riskCVE-2026-115261.4% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 68% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-11526 | coverage & exploitation status | NVD · CVE.org |
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