# CVE-2025-27820: Apache HttpComponents: PSL (Public Suffix List) validation bypass

> CVE-2025-27820: Apache HttpComponents: PSL (Public Suffix List) validation bypass. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-27820
Last updated: 2026-06-17T09:04:16Z

- Published: 2025-04-24 11:44 UTC · Updated: 2026-06-17 09:04 UTC · Assigner: apache
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS: 0.97%, 61th percentile (scored 2026-10-25)
- CISA KEV: no

## 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

## Affected vendors and products

- Apache Software Foundation: Apache HttpComponents

## Tracked companies

- [Confluence](https://rewindex.com/company/confluence.md)
- [Jira](https://rewindex.com/company/jira.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-27820)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-27820)
- [https://github.com/apache/httpcomponents-client/pull/574](https://github.com/apache/httpcomponents-client/pull/574)
- [https://github.com/apache/httpcomponents-client/pull/621](https://github.com/apache/httpcomponents-client/pull/621)
- [https://hc.apache.org/httpcomponents-client-5.4.x/index.html](https://hc.apache.org/httpcomponents-client-5.4.x/index.html)
- [https://lists.apache.org/thread/55xhs40ncqv97qvoocok44995xp5kqn8](https://lists.apache.org/thread/55xhs40ncqv97qvoocok44995xp5kqn8)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-27820 · Markdown: https://rewindex.com/cve/CVE-2025-27820.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-27820 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:04.671Z