CVE-2026-25854 (GCVE-0-2026-25854)
Vulnerability from cvelistv5 – Published: 2026-04-09 19:13 – Updated: 2026-04-10 18:22
VLAI
EPSS
VEX
Title
Apache Tomcat: Occasionally open redirect
Summary
Occasional URL redirection to untrusted Site ('Open Redirect') vulnerability in Apache Tomcat via the LoadBalancerDrainingValve.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, from 8.5.30 through 8.5.100.
Other, unsupported versions may also be affected
Users are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-10 18:21 UTC
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/ghct3b6o74bp2vm7q… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.0-M1 , ≤ 11.0.18
(semver)
Affected: 10.1.0-M1 , ≤ 10.1.52 (semver) Affected: 9.0.0.M23 , ≤ 9.0.115 (semver) Affected: 8.5.30 , ≤ 8.5.100 (semver) Unaffected: 0 , ≤ 7.0.109 (semver) |
guessed |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-04-09T23:15:47.041Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/04/09/21"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-25854",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-10T18:21:57.176392Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-10T18:22:34.359Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Apache Tomcat",
"vendor": "Apache Software Foundation",
"versions": [
{
"lessThanOrEqual": "11.0.18",
"status": "affected",
"version": "11.0.0-M1",
"versionType": "semver"
},
{
"lessThanOrEqual": "10.1.52",
"status": "affected",
"version": "10.1.0-M1",
"versionType": "semver"
},
{
"lessThanOrEqual": "9.0.115",
"status": "affected",
"version": "9.0.0.M23",
"versionType": "semver"
},
{
"lessThanOrEqual": "8.5.100",
"status": "affected",
"version": "8.5.30",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.109",
"status": "unaffected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "gregk4sec (https://github.com/gregk4sec)"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eOccasional URL redirection to untrusted Site (\u0027Open Redirect\u0027) vulnerability in Apache Tomcat via the LoadBalancerDrainingValve.\u003c/p\u003e\u003cp\u003eThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, from 8.5.30 through 8.5.100.\u003cbr\u003eOther, unsupported versions may also be affected\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.\u003c/p\u003e"
}
],
"value": "Occasional URL redirection to untrusted Site (\u0027Open Redirect\u0027) vulnerability in Apache Tomcat via the LoadBalancerDrainingValve.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, from 8.5.30 through 8.5.100.\nOther, unsupported versions may also be affected\n\nUsers are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue."
}
],
"metrics": [
{
"other": {
"content": {
"text": "low"
},
"type": "Textual description of severity"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-601",
"description": "CWE-601 URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-09T19:13:13.529Z",
"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"shortName": "apache"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://lists.apache.org/thread/ghct3b6o74bp2vm7q875s1zh0dqrz3h0"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Apache Tomcat: Occasionally open redirect",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2026-25854",
"datePublished": "2026-04-09T19:13:13.529Z",
"dateReserved": "2026-02-06T16:25:11.569Z",
"dateUpdated": "2026-04-10T18:22:34.359Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-25854",
"date": "2026-09-16",
"epss": "0.00526",
"percentile": "0.43255"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-25854\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2026-04-09T20:16:24.207\",\"lastModified\":\"2026-06-17T10:25:19.763\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Occasional URL redirection to untrusted Site (\u0027Open Redirect\u0027) vulnerability in Apache Tomcat via the LoadBalancerDrainingValve.\\n\\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, from 8.5.30 through 8.5.100.\\nOther, unsupported versions may also be affected\\n\\nUsers are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.\"}],\"affected\":[{\"source\":\"security@apache.org\",\"affectedData\":[{\"vendor\":\"Apache Software Foundation\",\"product\":\"Apache Tomcat\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"11.0.0-M1\",\"lessThanOrEqual\":\"11.0.18\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"10.1.0-M1\",\"lessThanOrEqual\":\"10.1.52\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"9.0.0.M23\",\"lessThanOrEqual\":\"9.0.115\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"8.5.30\",\"lessThanOrEqual\":\"8.5.100\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThanOrEqual\":\"7.0.109\",\"versionType\":\"semver\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N\",\"baseScore\":6.1,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":2.7}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-04-10T18:21:57.176392Z\",\"id\":\"CVE-2026-25854\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@apache.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-601\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.0.1\",\"versionEndExcluding\":\"9.0.116\",\"matchCriteriaId\":\"5585CA5A-76EA-43E1-BB66-BE1D80BDE1E9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"10.1.0\",\"versionEndExcluding\":\"10.1.53\",\"matchCriteriaId\":\"D0914AD3-D9E6-470C-A858-64D0CFA3F733\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"11.0.0\",\"versionEndExcluding\":\"11.0.20\",\"matchCriteriaId\":\"1F39B82B-0E67-459D-8065-2C6EE7970D0D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone23:*:*:*:*:*:*\",\"matchCriteriaId\":\"D7D8F2F4-AFE2-47EA-A3FD-79B54324DE02\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone24:*:*:*:*:*:*\",\"matchCriteriaId\":\"1B4FBF97-DE16-4E5E-BE19-471E01818D40\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone25:*:*:*:*:*:*\",\"matchCriteriaId\":\"3B266B1E-24B5-47EE-A421-E0E3CC0C7471\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone26:*:*:*:*:*:*\",\"matchCriteriaId\":\"29614C3A-6FB3-41C7-B56E-9CC3F45B04F0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone27:*:*:*:*:*:*\",\"matchCriteriaId\":\"C6AB156C-8FF6-4727-AF75-590D0DCB3F9D\"}]}]}],\"references\":[{\"url\":\"https://lists.apache.org/thread/ghct3b6o74bp2vm7q875s1zh0dqrz3h0\",\"source\":\"security@apache.org\",\"tags\":[\"Mailing List\",\"Vendor Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/04/09/21\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-07-15T13:15:06+00:00",
"cve": "CVE-2026-25854",
"id": "CVE-2026-25854",
"initial_release_date": "2026-04-09T19:13:13.529000+00:00",
"product_status:fixed": "43",
"product_status:known_affected": "56",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Apache Tomcat: Apache Tomcat: Open Redirect vulnerability via LoadBalancerDrainingValve",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25854.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-28T01:30:59Z",
"cve": "CVE-2026-25854",
"id": "CVE-2026-25854",
"initial_release_date": "2026-04-10T23:27:35Z",
"product_status:known_affected": "82",
"product_status:known_not_affected": "1",
"product_status:recommended": "423",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-25854",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-25854.json",
"version": "12"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"http://www.openwall.com/lists/oss-security/2026/04/09/21\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2026-04-09T23:15:47.041Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 6.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-25854\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-10T18:21:57.176392Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-10T18:20:59.184Z\"}}], \"cna\": {\"title\": \"Apache Tomcat: Occasionally open redirect\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"gregk4sec (https://github.com/gregk4sec)\"}], \"metrics\": [{\"other\": {\"type\": \"Textual description of severity\", \"content\": {\"text\": \"low\"}}}], \"affected\": [{\"vendor\": \"Apache Software Foundation\", \"product\": \"Apache Tomcat\", \"versions\": [{\"status\": \"affected\", \"version\": \"11.0.0-M1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"11.0.18\"}, {\"status\": \"affected\", \"version\": \"10.1.0-M1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"10.1.52\"}, {\"status\": \"affected\", \"version\": \"9.0.0.M23\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"9.0.115\"}, {\"status\": \"affected\", \"version\": \"8.5.30\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.5.100\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.0.109\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://lists.apache.org/thread/ghct3b6o74bp2vm7q875s1zh0dqrz3h0\", \"tags\": [\"vendor-advisory\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Occasional URL redirection to untrusted Site (\u0027Open Redirect\u0027) vulnerability in Apache Tomcat via the LoadBalancerDrainingValve.\\n\\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, from 8.5.30 through 8.5.100.\\nOther, unsupported versions may also be affected\\n\\nUsers are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eOccasional URL redirection to untrusted Site (\u0027Open Redirect\u0027) vulnerability in Apache Tomcat via the LoadBalancerDrainingValve.\u003c/p\u003e\u003cp\u003eThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, from 8.5.30 through 8.5.100.\u003cbr\u003eOther, unsupported versions may also be affected\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-601\", \"description\": \"CWE-601 URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"shortName\": \"apache\", \"dateUpdated\": \"2026-04-09T19:13:13.529Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-25854\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-10T18:22:34.359Z\", \"dateReserved\": \"2026-02-06T16:25:11.569Z\", \"assignerOrgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"datePublished\": \"2026-04-09T19:13:13.529Z\", \"assignerShortName\": \"apache\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…