Bug 2525588 (CVE-2026-42392)

Summary: CVE-2026-42392 dovecot: Dovecot: Information disclosure via invalid IMAP URLFETCH command
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: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in Dovecot. An attacker with valid credentials can send an invalid IMAP URLFETCH command, leading to the inclusion of uninitialized memory in the error response. This can disclose process memory contents to the client, potentially revealing sensitive data.
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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: 2526686    
Bug Blocks:    

Description OSIDB Bzimport 2026-08-28 11:24:29 UTC 
An attacker that has valid credentials can send an invalid IMAP URLFETCH command, which causes uninitialized memory to be included in the error response returned to the client. Process memory contents can be disclosed to the client, which may include sensitive data. Disable the IMAP URLAUTH functionality. Update to non-vulnerable version. No publicly available exploits are known.