Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-08-31 08:39

Modified

2026-08-31 08:57

Summary

Apache Tomcat: RewriteValve [N] restarts at the second rule and may bypass access control

Details

Off-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule.

This issue affects Apache Tomcat: from 11.0.0 through 11.0.24, from 10.1.0 through 10.1.57, from 9.0.0 through 9.0.120.

The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121 which fix the issue.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "tomcat",
        "purl": "pkg:bitnami/tomcat"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.5.0"
            },
            {
              "fixed": "9.0.121"
            },
            {
              "introduced": "10.1.0"
            },
            {
              "fixed": "10.1.58"
            },
            {
              "introduced": "11.0.0"
            },
            {
              "fixed": "11.0.25"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-65927"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:tomcat:*:*:*:*:*:maven:*:*"
    ],
    "severity": "High"
  },
  "details": "Off-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule.\n\n\n\n\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0 through 11.0.24, from 10.1.0 through 10.1.57, from 9.0.0 through 9.0.120.\n\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121 which fix the issue.",
  "id": "BIT-tomcat-2026-65927",
  "modified": "2026-08-31T08:57:38.024Z",
  "published": "2026-08-31T08:39:51.707Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/26/5"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/st1dx1zyn5y7ny2s0sscmh6lrv3worr4"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-65927"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache Tomcat: RewriteValve [N] restarts at the second rule and may bypass access control"
}

CVE-2026-65927 (GCVE-0-2026-65927)

Vulnerability from cvelistv5 – Published: 2026-08-25 21:53 – Updated: 2026-08-26 15:22

Title

Apache Tomcat: RewriteValve [N] restarts at the second rule and may bypass access control

Summary

Off-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121 which fix the issue.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-26 15:21 UTC

CWE

CWE-193 - Off-by-one Error

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/st1dx1zyn5y7ny2s0…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/08/26/5

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.24 (semver) Affected: 10.1.0-M1 , ≤ 10.1.57 (semver) Affected: 9.0.0.M1 , ≤ 9.0.120 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Unaffected: 7.0.0 , ≤ 7.0.109 (semver) Unaffected: 0 , < 7.0.0 (semver)

Credits

4ra1n, pyn3rd and unam4

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2026-08-26T02:30:38.001Z",
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-26T15:21:40.924718Z",
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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.

Detection rules are retrieved from Rulezet.

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.

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Vulnerability from bitnami_vulndb

CVE-2026-65927 (GCVE-0-2026-65927)

Tags

Sightings

Nomenclature