PatchSiren cyber security CVE debrief
CVE-2026-56366 ImageMagick CVE debrief
CVE-2026-56366 is a memory leak vulnerability in ImageMagick's META reader when processing APP1JPEG input paths. This vulnerability can be triggered by providing specially crafted APP1JPEG image files, potentially leading to denial of service through resource exhaustion. The vulnerability exists in ImageMagick before version 7.1.2-18 and has a CVSS score of 4.8, classified as MEDIUM severity. Users and administrators should be aware of this vulnerability and take necessary precautions to mitigate its impact.
- Vendor
- ImageMagick
- Product
- Unknown
- CVSS
- MEDIUM 4.8
- 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 APP1JPEG image files, should be aware of this vulnerability and take necessary precautions. This includes applying the patch or upgrading to ImageMagick version 7.1.2-18 or later, implementing input validation and sanitization for APP1JPEG image files, and monitoring for suspicious image processing activities.
Technical summary
The vulnerability exists in ImageMagick before version 7.1.2-18. A memory leak occurs in the META reader when processing APP1JPEG input paths. Attackers can exploit this by providing specially crafted APP1JPEG image files, potentially causing denial of service through resource exhaustion. The CVSS score for this vulnerability is 4.8, classified as MEDIUM severity. This vulnerability can be mitigated by applying the patch or upgrading to ImageMagick version 7.1.2-18 or later.
Defensive priority
Medium priority should be given to patching or mitigating this vulnerability, especially in environments where ImageMagick is used to process untrusted image files.
Recommended defensive actions
- Apply the patch or upgrade to ImageMagick version 7.1.2-18 or later.
- Implement input validation and sanitization for APP1JPEG image files.
- Monitor for suspicious image processing activities.
- Consider using alternative image processing libraries or tools.
- 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.
Evidence notes
The CVE record was published on 2026-07-10T15:16:43.217Z and last modified on 2026-07-10T18:01:31.563Z. The NVD entry is currently Undergoing Analysis. Limited details are available about the vulnerability's impact and exploitation. Further verification is needed to confirm affected scope, severity, and vendor guidance.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-10T15:16:43.217Z and has not been modified since then. The NVD entry is currently Undergoing Analysis.