CVE-2025-27820

moderate-risk
Published 2025-04-24

A bug in PSL validation logic in Apache HttpClient 5.4.x disables domain checks, affecting cookie management and host name verification. Discovered by the Apache HttpClient team. Fixed in the 5.4.3 release

Do I need to act?

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0.33% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (2)

Httpclient

Affected Vendors

Apache Netapp

References (5)

Issue Tracking https://github.com/apache/httpcomponents-client/pull/574
Issue Tracking https://github.com/apache/httpcomponents-client/pull/621
Product https://hc.apache.org/httpcomponents-client-5.4.x/index.html
Mailing List https://lists.apache.org/thread/55xhs40ncqv97qvoocok44995xp5kqn8
Third Party Advisory https://security.netapp.com/advisory/ntap-20250516-0003/
34
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 1/34 · Minimal
Exposure 7/34 · Low