CVE-2025-27820
highpriority · track · 0EPSS 0.010 · 62 %ileDEEUFRRUUSEPSS · scored 2026-10-27
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
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (18)
Products and version ranges known to be affected.
- Maven org.apache.httpcomponents.client5:httpclient55.4-alpha1 → 5.4.3osvUSpkg:maven/org.apache.httpcomponents.client5/httpclient5
advisories (5)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2025-1579Atlassian Bamboo Data Center und Server: Schwachstelle ermöglicht Offenlegung von InformationenDeutsch2025-07-15csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Atlassian Bamboo Data Center und Server ausnutzen, um Informationen offenzulegen.
- WID-SEC-W-2026-0351Dell NetWorker (Third Party Components): Mehrere SchwachstellenDeutsch2026-02-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Dell NetWorker ausnutzen, um Angriffe zu starten, die die Integrität, Vertraulichkeit und Verfügbarkeit von Systemen beeinträchtigen.
- WID-SEC-W-2026-1204Oracle Financial Services Applications: Mehrere SchwachstellenDeutsch2026-04-21csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Financial Services Applications ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.
- GHSA-73m2-qfq3-56cxApache HttpClient disables domain checks2025-04-24ghsa · osvUS
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.
- CERTFR-2026-AVI-1349Multiples vulnérabilités dans Oracle Database ServerFrançais2026-10-21vendor · certfrFR
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (15)
External citations — patches, advisories, analysis.
- https://github.com/apache/cnnvd
- https://github.com/apache/httpcomponents-client/tagsPatchcnnvd
- https://hc.apache.org/cnnvd
- https://lists.apache.org/thread/55xhs40ncqv97qvoocok44995xp5kqn8cnnvd
- https://www.oracle.com/security-alerts/cpuapr2026.htmlcnnvd
- https://www.oracle.com/security-alerts/cpujul2025.htmlcnnvd
- https://github.com/apache/httpcomponents-client/pull/574enisa_euvd
- https://github.com/apache/httpcomponents-client/pull/621enisa_euvd
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