PatchSiren cyber security CVE debrief
CVE-2026-56373 ImageMagick CVE debrief
A use-after-free vulnerability was discovered in ImageMagick's PDB decoder. The vulnerability occurs when memory allocation fails, causing a stale pointer to be used. This can be triggered by processing malicious PDB files, leading to crashes or writing a single zero byte to freed memory. The affected product is ImageMagick, specifically versions before 7.1.2-15. The vulnerability class is use-after-free, and the likely operational impact includes crashes or potential code execution.
- Vendor
- ImageMagick
- Product
- Unknown
- CVSS
- MEDIUM 6.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-10
- Original CVE updated
- 2026-07-10
- Advisory published
- 2026-07-10
- Advisory updated
- 2026-07-10
Who should care
Users and administrators of ImageMagick, especially those processing PDB files, should be aware of this vulnerability and take necessary precautions. This includes reviewing the official advisory, assessing exposure, and applying patches or mitigations as needed. Vulnerability management and security teams should prioritize patching and monitor for suspicious activity.
Technical summary
The vulnerability is caused by a use-after-free error in the PDB decoder of ImageMagick. When memory allocation fails, a stale pointer is used, leading to potential crashes or writing to freed memory. This can be exploited by processing malicious PDB files. The affected product context is ImageMagick's PDB decoder, and the defensive impact includes the need for patching or upgrading to a fixed version.
Defensive priority
Medium priority should be given to patching this vulnerability, as it can be exploited to cause crashes or potentially lead to further exploitation.
Recommended defensive actions
- Apply the official patch or upgrade to ImageMagick version 7.1.2-15 or later
- Restrict access to PDB file processing to trusted sources
- Monitor for suspicious PDB file processing activity
- Review compensating controls for exposed systems while remediation is scheduled and verified
- Check relevant monitoring, detection, and logs for exposed assets that need extra review
- Track exceptions, retest remediated assets, and close the item only after evidence is documented
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
Evidence notes
The CVE record was published on 2026-07-10T15:16:43.450Z and last modified on 2026-07-10T17:49:57.737Z. The NVD entry is currently Undergoing Analysis. This information is based on the provided source corpus and may not reflect the current status. Users should verify the information with the official sources for the most up-to-date details.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-10T15:16:43.450Z and has not been modified since then. The NVD entry is currently Undergoing Analysis.