AZL-81701

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Import Source

https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-81701.json

JSON Data

https://api.osv.dev/v1/vulns/AZL-81701

Upstream

CVE-2026-27855

Published

2026-03-27T09:16:19Z

Modified

2026-08-30T05:24:52Z

Summary

CVE-2026-27855 affecting package dovecot 2.3.20-1

Details

Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and username is altered in passdb, then OTP credentials can be cached so that same OTP reply is valid. An attacker able to observe an OTP exchange is able to log in as the user. If authentication happens over unsecure connection, switch to SCRAM protocol. Alternatively ensure the communcations are secured, and if possible switch to OAUTH2 or SCRAM. No publicly available exploits are known.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-27855

Affected packages

Azure Linux:3 / dovecot

Package

Name: dovecot
Purl: pkg:rpm/azure-linux/dovecot

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Last affected

2.3.20-1

Database specific

source

"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-81701.json"