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GHSA-RV64-5GF8-9QQ8

Vulnerability from github – Published: 2026-04-09 21:31 – Updated: 2026-04-10 00:30

Details

Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.40 through 9.0.116.

Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117 , which fix the issue.

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  "affected": [],
  "aliases": [
    "CVE-2026-34483"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-116"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-09T20:16:24Z",
    "severity": null
  },
  "details": "Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.40 through 9.0.116.\n\nUsers are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117 , which fix the issue.",
  "id": "GHSA-rv64-5gf8-9qq8",
  "modified": "2026-04-10T00:30:28Z",
  "published": "2026-04-09T21:31:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34483"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/04/09/26"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-34483 (GCVE-0-2026-34483)

Vulnerability from cvelistv5 – Published: 2026-04-09 19:30 – Updated: 2026-04-10 20:17

Title

Apache Tomcat: Incomplete escaping of JSON access logs

Summary

Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.40 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117 , which fix the issue.

Severity ?

No CVSS data available.

CWE

CWE-116 - Improper Encoding or Escaping of Output

Assigner

apache

References

URL

Tags

https://lists.apache.org/thread/j1w7304yonlr8vo1t…

vendor-advisory

Impacted products

	Vendor	Product	Version
	Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.20 (semver) Affected: 10.1.0-M1 , ≤ 10.1.53 (semver) Affected: 9.0.40 , ≤ 9.0.116 (semver) Affected: 8.5.84 , ≤ 8.5.100 (semver) Unaffected: 0 , ≤ 8.5.83 (semver)

Credits

Bartlomiej Dmitruk, striga.ai

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JSON

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              "baseScore": 7.5,
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              "confidentialityImpact": "HIGH",
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              "privilegesRequired": "NONE",
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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-RV64-5GF8-9QQ8

CVE-2026-34483 (GCVE-0-2026-34483)

Tags

Sightings

Nomenclature