Bug 2431928 (CVE-2026-23991)

Summary: CVE-2026-23991 github.com/theupdateframework/go-tuf/v2: go-tuf client DoS via malformed server response
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: unspecifiedCC: akoudelk, dfreiber, drow, eborisov, jburrell, lball, lbragsta, ljawale, luizcosta, ngough, nweather, rbobbitt, sdawley, teagle, veshanka, vkumar, wenshen
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A denial of service flaw has been discovered in go-tuf. If the TUF repository (or any of its mirrors) returns invalid TUF metadata JSON (valid JSON but not well formed TUF metadata), the client will panic during parsing, causing a denial of service. The panic happens before any signature is validated. This means that a compromised repository/mirror/cache can DoS clients without having access to any signing key.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2433098, 2433099, 2433101, 2433103, 2433105, 2433108    
Bug Blocks:    

Description OSIDB Bzimport 2026-01-22 03:01:35 UTC
go-tuf is a Go implementation of The Update Framework (TUF). Starting in version 2.0.0 and prior to version 2.3.1, if the TUF repository (or any of its mirrors) returns invalid TUF metadata JSON (valid JSON but not well formed TUF metadata), the client will panic during parsing, causing a denial of service. The panic happens before any signature is validated. This means that a compromised repository/mirror/cache can DoS clients without having access to any signing key. Version 2.3.1 fixes the issue. No known workarounds are available.