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CVE-2026-34483

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:45d856e5a6fea0bde20fab492ae17cb25a91e4964e0ec3c4023e88697ef3a26d
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Apache Tomcat","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"11.0.20","status":"affected","version":"11.0.0-M1","versionType":"semver"},{"lessThanOrEqual":"10.1.53","status":"affected","version":"10.1.0-M1","versionType":"semver"},{"lessThanOrEqual":"9.0.116","status":"affected","version":"9.0.40","versionType":"semver"},{"lessThanOrEqual":"8.5.100","status":"affected","version":"8.5.84","versionType":"semver"},{"lessThanOrEqual":"8.5.83","status":"unaffected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9d3de5ef5581f874c78e9f1322fc474bed725f7047ee2c61f92b3285a37af8d6 · sha256:934cd76b31292b3d… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9d3de5ef5581f874c78e9f1322fc474bed725f7047ee2c61f92b3285a37af8d6 · sha256:934cd76b31292b3d… · /containers/adp/1/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-116","description":"CWE-116 Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9d3de5ef5581f874c78e9f1322fc474bed725f7047ee2c61f92b3285a37af8d6 · sha256:934cd76b31292b3d… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/04/09/26"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9d3de5ef5581f874c78e9f1322fc474bed725f7047ee2c61f92b3285a37af8d6 · sha256:934cd76b31292b3d… · /containers/adp/0/references/0
{"tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9d3de5ef5581f874c78e9f1322fc474bed725f7047ee2c61f92b3285a37af8d6 · sha256:934cd76b31292b3d… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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