CVE-2025-27820

Apache HttpComponents: PSL (Public Suffix List) validation bypass

Description

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

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory apache.org
Affected: Apache Software Foundation Apache HttpComponents
Published at:
Updated at:

References

Link Tags
https://github.com/apache/httpcomponents-client/pull/574 patch
https://github.com/apache/httpcomponents-client/pull/621 patch
https://hc.apache.org/httpcomponents-client-5.4.x/index.html product
https://lists.apache.org/thread/55xhs40ncqv97qvoocok44995xp5kqn8 vendor advisory
https://security.netapp.com/advisory/ntap-20250516-0003/

Frequently Asked Questions

What is the severity of CVE-2025-27820?
CVE-2025-27820 has been scored as a high severity vulnerability.
How to fix CVE-2025-27820?
To fix CVE-2025-27820, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-27820 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-27820 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-27820?
CVE-2025-27820 affects Apache Software Foundation Apache HttpComponents.
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