Bug 2561094 (CVE-2026-116580)

Summary: CVE-2026-116580 seroval: seroval: Unintended function execution via crafted serialized input
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedCC: blitton, mbarnett
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in seroval. During deserialization, the process of converting serialized data back into live objects, the library fails to properly validate internal stream sources. A remote attacker can exploit this issue by supplying crafted input that reuses object identifiers, causing the deserializer to invoke unintended functions exposed by application plugins. Depending on the functionality provided by the application plugin, this can lead to unauthorized data disclosure, data modification, or a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-10-26 20:47:54 UTC 
Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring source to be a genuine internal stream. With untrusted Seroval input and an application plugin that returns a callable value or an object exposing an on method, a crafted node can reuse an identifier so the deserializer invokes the plugin-produced value. This is an incomplete-fix variant of CVE-2026-59940. The resulting confidentiality, integrity, or availability impact depends on the behavior exposed by the application plugin. This issue is fixed in version 1.6.8.