CVE-2026-53437 (GCVE-0-2026-53437)
Vulnerability from cvelistv5
Published
2026-06-10 13:05
Modified
2026-08-27 12:04
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Jenkins Project | Jenkins |
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\"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:60252\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:60259\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:60254\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:60256\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.\"}], \"x_generator\": {\"engine\": \"sadp-cli 1.0.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in Jenkins. This vulnerability allows a remote attacker to perform phishing attacks by crafting a malicious redirect URL. The flaw occurs because Jenkins improperly validates redirect URLs after login, specifically when tab or newline characters are present between the `//` in the URL. This can trick users into visiting malicious sites, potentially leading to credential theft or other security compromises.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-601\", \"description\": \"URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\", \"shortName\": \"redhat-SADP\", \"dateUpdated\": \"2026-08-27T12:04:47.899Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-53437\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-10T15:42:49.165047Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-601\", \"description\": \"CWE-601 URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-10T15:41:43.114Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"Jenkins Project\", \"product\": \"Jenkins\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"2.568\", \"lessThan\": \"*\", \"versionType\": \"maven\"}, {\"status\": \"unaffected\", \"version\": \"2.555.3\", \"lessThan\": \"2.555.*\", \"versionType\": \"maven\"}], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3711+3755\", \"name\": \"Jenkins Security Advisory 2026-06-10\", \"tags\": [\"vendor-advisory\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"providerMetadata\": {\"orgId\": \"39769cd5-e6e2-4dc8-927e-97b3aa056f5b\", \"shortName\": \"jenkins\", \"dateUpdated\": \"2026-06-10T13:05:58.584Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-53437\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-27T12:04:47.899Z\", \"dateReserved\": \"2026-06-09T14:26:44.788Z\", \"assignerOrgId\": \"39769cd5-e6e2-4dc8-927e-97b3aa056f5b\", \"datePublished\": \"2026-06-10T13:05:58.584Z\", \"assignerShortName\": \"jenkins\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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