Bug 2500056 (CVE-2026-62642)

Summary: CVE-2026-62642 roundcubemail: Roundcube Webmail: Denial of Service via infinite loop in TNEF decoder
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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 Roundcube Webmail. A remote attacker could exploit an infinite loop vulnerability in the TNEF (Transport Neutral Encapsulation Format) decoder by sending a specially crafted email with a TNEF attachment. This could lead to a denial of service, making the webmail service unavailable to users.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2500064, 2500065    
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Description OSIDB Bzimport 2026-07-14 17:02:54 UTC
In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, an infinite loop was discovered in the TNEF decoder, which may lead to denial of service upon opening an email with a TNEF attachment.