CVE-2025-27820
Apache HttpComponents: PSL (Public Suffix List) validation bypass
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
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Apache HttpComponents: PSL (Public Suffix List) validation bypass
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
- Record
CVE-2025-27820- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
EUVDEUVD-2025-12102
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
- Record
EUVD-2025-12102- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-73m2-qfq3-56cx
Apache HttpClient disables domain checks
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.
- Record
GHSA-73m2-qfq3-56cx- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
NVD
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
- Record
CVE-2025-27820- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
OSV
Apache HttpComponents: PSL (Public Suffix List) validation bypass
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
- Record
CVE-2025-27820- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-73m2-qfq3-56cx
Apache HttpClient disables domain checks
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.
- Record
GHSA-73m2-qfq3-56cx- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2025-27820
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
- Record
UBUNTU-CVE-2025-27820- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.httpcomponents.client5:httpclient5Maven |
5.4-alpha1 up to 5.4.3 | 5.4.3 |
org.apache.httpcomponents.client5:httpclient5Maven |
5.4-alpha1 up to 5.4.3, plus listed versions 5.45.4-alpha25.4-beta15.4.15.4.2 |
5.4.3 |
httpcomponents-clientUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 4.2.5-24.3.2-14.3.3-14.3.3-1ubuntu0.14.3.3-1ubuntu0.1+esm14.3.3-1ubuntu0.1+esm2 |
None known |
httpcomponents-clientUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 4.4.1-14.5.1-14.5.1-1ubuntu0.1~esm1 |
None known |
httpcomponents-clientUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 4.5.3-14.5.4-14.5.5-14.5.5-1ubuntu0.1~esm1 |
None known |
httpcomponents-clientUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 4.5.9-14.5.10-24.5.11-14.5.11-1ubuntu0.1~esm1 |
None known |
httpcomponents-clientUbuntu:22.04:LTS |
All versions, plus listed versions 4.5.13-24.5.13-3 |
None known |
httpcomponents-clientUbuntu:24.04:LTS |
All versions, plus listed versions 4.5.14-1 |
None known |
httpcomponents-clientUbuntu:25.10 |
All versions, plus listed versions 4.5.14-1 |
None known |
httpcomponents-clientUbuntu:26.10 |
All versions, plus listed versions 4.5.14-1build1 |
None known |
httpcomponents-clientUbuntu:26.04:LTS |
All versions, plus listed versions 4.5.14-14.5.14-1build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-27820 is a high vulnerability (CVSS 7.5) in Apache Httpclient, published April 24, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.97%, the 61st percentile. Fixed in org.apache.httpcomponents.client5:httpclient5 5.4.3.