CVE-2025-67635: jenkins — Fix

Description

Jenkins 2.540 and earlier, LTS 2.528.2 and earlier does not properly close HTTP-based CLI connections when the connection stream becomes corrupted, allowing unauthenticated attackers to cause a denial of service.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-404 CWE-404

Affected Products

Vendor	Product	Versions
jenkins	jenkins	< 2.528.3
jenkins	jenkins	< 2.541

References

Advisories & Patches

https://www.jenkins.io/security/advisory/2025-12-10/#SECURITY-3630

Frequently Asked Questions

What is CVE-2025-67635? +

Jenkins 2.540 and earlier, LTS 2.528.2 and earlier does not properly close HTTP-based CLI connections when the connection stream becomes corrupted, allowing unauthenticated attackers to cause a denial of service. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-67635? +

CVE-2025-67635 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-67635? +

CVE-2025-67635 affects products from jenkins, specifically: jenkins. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-67635? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-67635