Bug 2442122 (CVE-2026-25966)

Summary: CVE-2026-25966 ImageMagick: ImageMagick: Policy bypass allows unauthorized access to standard streams via fd:<n> pseudo-filenames
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in ImageMagick. The "secure" security policy, intended to prevent reading and writing from standard streams, can be bypassed. An attacker can exploit this by using fd:<n> pseudo-filenames, which are not properly blocked by the policy. This allows the attacker to circumvent the intended security restrictions, potentially leading to unauthorized access to standard input/output (stdin/stdout) and subsequent information disclosure or data manipulation.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2442169, 2442170    
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Description OSIDB Bzimport 2026-02-24 02:02:54 UTC 
ImageMagick is free and open-source software used for editing and manipulating digital images. The shipped "secure" security policy includes a rule intended to prevent reading/writing from standard streams. However, ImageMagick also supports fd:<n> pseudo-filenames (e.g., fd:0, fd:1). Prior to versions 7.1.2-15 and 6.9.13-40, this path form is not blocked by the secure policy templates, and therefore bypasses the protection goal of "no stdin/stdout." Versions 7.1.2-15 and 6.9.13-40 contain a patch by including a change to the more secure policies by default. As a workaround, add the change to one's security policy manually.