CVE-2026-53437
Description
Jenkins versions 2.567 and earlier are vulnerable to phishing attacks due to improper handling of redirect URLs containing tab or newline characters.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Jenkins versions 2.567 and earlier are vulnerable to phishing attacks due to improper handling of redirect URLs containing tab or newline characters.
Vulnerability
Jenkins versions 2.567 and earlier, and LTS 2.555.2 and earlier, improperly determine that a redirect URL after login is legitimately pointing to Jenkins when it contains tab or newline characters between //. This allows attackers to craft malicious URLs that can be used for phishing attacks [1].
Exploitation
An attacker needs to have Overall/Read permission and either a user account or permissions allowing them to POST config.xml to exploit this vulnerability. The attacker can then submit a crafted config.xml file that leverages the improper redirect URL handling to perform phishing attacks [1].
Impact
Successful exploitation allows attackers to perform phishing attacks by redirecting users to malicious sites. This could lead to the compromise of user credentials or other sensitive information through deceptive means [1].
Mitigation
Jenkins versions 2.567 and earlier, and LTS 2.555.2 and earlier, are affected. The Jenkins project has released security advisories and fixed versions are expected. Users are advised to update to a patched version as soon as it becomes available. Further details can be found in the Jenkins security advisory [1].
AI Insight generated on Jun 10, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
1- Range: <=2.567, LTS <=2.555.2
Patches
0No patches discovered yet.
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
1News mentions
2- Jenkins Core: Eight Vulnerabilities Disclosed Together on June 10, 2026Vypr Intelligence · Jun 10, 2026
- Jenkins Security Advisory 2026-06-10Jenkins Security Advisories · Jun 10, 2026