CVE-2026-53437: Jenkins · Open Redirect
Affects JenkinsSource CVE Database V5
Not known to be exploited · CVSS 4.3 Medium : upgrade to 2.567 when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 40% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.567
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 10 Jun 2026
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 30 Oct 2026.
What to do
Upgrade org.jenkins-ci/main/jenkins-core to 2.567.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Mavenorg.jenkins-ci/main/jenkins-corepkg:maven/org.jenkins-ci/main/jenkins-coreOther threats | 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
If you cannot patch yet, users should be cautious with redirect URLs after login and educate users about phishing risks involving URL obfuscation with whitespace characters.
Description
Jenkins 2.567 and earlier, LTS 2.555.2 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins when it contains tab or newline characters between `//`, allowing attackers to perform phishing attacks.
References
- jenkins.io/security/advisory/2026-06-10/ (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-53437 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2487544 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53437.json (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60247 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60239 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60251 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60246 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60250 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60259 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60254 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60249 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60248 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60252 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60256 (opens in a new tab)