CVE-2025-59476: Org.jenkins ci.main:jenkins core: Jenkins has a log message injection vulnerability
Affects org.jenkins-ci.main:jenkins-coreSource GCVE Database
Not known to be exploited · CVSS 5.3 Medium : upgrade to 2.516.3 when convenient.
Data as of 4 Nov 2026, 18:17 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 5.3 |
|---|
- Patch
- Available – fixed in 2.516.3, 2.528
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 17 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 4 Nov 2026.
What to do
Upgrade org.jenkins-ci.main:jenkins-core to 2.516.3; org.jenkins-ci.main:jenkins-core to 2.528.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Mavenorg.jenkins-ci.main:jenkins-core | Affected
| Fixed in
|
| Mavenorg.jenkins-ci.main:jenkins-core | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available and has been released in Jenkins versions 2.516.3 and 2.528. Users should upgrade affected Jenkins instances to these or later versions to mitigate this vulnerability. No additional mitigation steps are indicated by the vendor.
Description
Jenkins versions 2.527 and earlier, including LTS 2.516.2 and earlier, have a log message injection vulnerability where user-controlled input in log messages can include line break characters. This allows attackers to insert forged log entries that may mislead administrators. Fixed in Jenkins 2.516.3 and 2.528 by adding indicators for inserted line breaks in log output.