Bug 2468982 (CVE-2026-8258)

Summary: CVE-2026-8258 Squirrel: Squirrel: Arbitrary Code Execution via Stack-based Buffer Overflow
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: alcohan, amctagga, anjoseph, anpicker, aoconnor, bniver, bparees, caswilli, dbosanac, eborisov, eglynn, fdeutsch, flucifre, gmeno, gparvin, groman, hasun, jbalunas, jfula, jjoyce, jkoehler, jowilson, jprabhak, jpretori, jreimann, jschluet, kaycoth, lball, lhh, lphiri, mbenjamin, mburns, mdessi, mgarciac, mhackett, mrizzi, ngough, nyancey, ometelka, oramraz, pahickey, pcattana, ptisnovs, rhaigner, smullick, sostapov, stirabos, syedriko, thason, vereddy, veshanka, wtam, xdharmai
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Squirrel. A local attacker can exploit a vulnerability in the `validate_format` function, which processes string formats, by providing specially crafted input. This manipulation can cause a stack-based buffer overflow, potentially leading to a denial of service or the execution of unauthorized code.
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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: 2479817, 2479818, 2479819, 2479820, 2479816    
Bug Blocks:    

Description OSIDB Bzimport 2026-05-11 02:01:18 UTC
A flaw has been found in Squirrel up to 3.2. Impacted is the function validate_format in the library sqstdlib/sqstdstring.cpp. Executing a manipulation can lead to stack-based buffer overflow. The attack can only be executed locally. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.