TI-2025-20592 Aliases CVE-2025-27820 GHSA-73m2-qfq3-56cx

Apache HttpComponents: PSL (Public Suffix List) validation bypass

MEDIUM 41CWE-295Published 2025-04-24 · Updated 2025-06-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Spoofing
Confidentiality · integrity · availability: None · High · None
Fix status: Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-295.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00966 61st percentileScored 2026-11-07

Fix Partial Apache HttpComponents (Apache Software Foundation): 5.4.3org.apache.httpcomponents.client5:httpclient5 (Maven): 5.4.3Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Apache	Apache HttpComponents	5.4.0 to before 5.4.3	5.4.3	Patch available	CNA
—	org.apache.httpcomponents.client5:httpclient5 (Maven)	5.4-alpha1 to before 5.4.3	5.4.3	Patch available	GHSA-73m2-qfq3-56cx

Apache HttpComponents VendorApache Affected 5.4.0 to before 5.4.3 Fixed in 5.4.3 Patch available CNA
org.apache.httpcomponents.client5:httpclient5 (Maven) Vendor— Affected 5.4-alpha1 to before 5.4.3 Fixed in 5.4.3 Patch available GHSA-73m2-qfq3-56cx

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:apache:httpclient::::::::	5.4 to before 5.4.3	Vulnerable	Apache
cpe:2.3:a:netapp:ontap_tools:10:::::vmware_vsphere::	10	Vulnerable	NetApp

cpe:2.3:a:apache:httpclient:*:*:*:*:*:*:*:* Versions 5.4 to before 5.4.3 Vulnerable ·Apache
cpe:2.3:a:netapp:ontap_tools:10:*:*:*:*:vmware_vsphere:*:* Versions 10 Vulnerable ·NetApp

Remediation

Fix · CNA Apache HttpComponents (Apache Software Foundation) Fixed in 5.4.3
Fix · GHSA-73m2-qfq3-56cx org.apache.httpcomponents.client5:httpclient5 (Maven) Fixed in 5.4.3 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat AMQ Clients	Affected	No fix yet: Fix deferred
streams for Apache Kafka 2	Affected	No fix yet: Fix deferred

Not affected: 19 products

Cryostat 3
Cryostat 4
Red Hat AMQ Broker 7
Red Hat Data Grid 8
Red Hat Fuse 7
Red Hat JBoss Enterprise Application Platform 7
Red Hat JBoss Enterprise Application Platform 8
Red Hat JBoss Enterprise Application Platform Expansion Pack
Red Hat JBoss Web Server 6
Red Hat OpenShift AI (RHOAI)
Red Hat Process Automation 7
Red Hat build of Apache Camel - HawtIO 4
Red Hat build of Apache Camel 4 for Quarkus 3
Red Hat build of Apache Camel for Spring Boot 4
Red Hat build of Apicurio Registry 2
Red Hat build of Apicurio Registry 3
Red Hat build of Debezium 2
Red Hat build of Debezium 3
streams for Apache Kafka

Timeline

2026-10-02 Threatist record created from CVE-2025-27820
2026-10-03 Alias added: GHSA-73m2-qfq3-56cx

References

Patch 3

Advisory 2

Other 3

TI-2013-03825 http/impl/client/HttpClientBuilder.java in Apache HttpClient 4.3.x before 4.3.1 does not… CVSS 3.1CRITICAL 9.8
TI-2026-49957 Apache HttpComponents Client: TLS hostname verification silently disabled on the async transport (default config, MITM) CVSS 3.1CRITICAL 9.1
TI-2020-10932 Improper input validation in Apache HttpClient CVSS 3.1MEDIUM 5.3
TI-2026-29288 Apache HttpClient: SCRAM-SHA-256 mutual authentication bypass may cause the client to… CVSS 3.1HIGH 7.3
TI-2015-04421 http/conn/ssl/SSLConnectionSocketFactory.java in Apache HttpComponents HttpClient before… CVSS 2.0MEDIUM 4.3
TI-2014-02901 org.apache.http.conn.ssl.AbstractVerifier in Apache HttpComponents HttpClient before… CVSS 2.0MEDIUM 5.8

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences