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No exploitation reportedFix available

CVE-2022-25762

No exploitation reported by the sources we read.

  • Published2022-05-13
  • Fixed in9.0.21 · 8.5.76
  • WeaknessCWE-404

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

If a web application sends a WebSocket message concurrently with the WebSocket connection closing when running on Apache Tomcat 8.5.0 to 8.5.75 or Apache Tomcat 9.0.0.M1 to 9.0.20, it is possible that the application will continue to use the socket after it has been closed. The error handling triggered in this case could cause the a pooled object to be placed in the pool twice. This could result in subsequent connections using the same object concurrently which could result in data being returned to the wrong use and/or other errors.

Timeline

dates in UTC
  1. 2022-05-1308:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-25762?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-25762?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Apache Tomcat
BranchAffectedFixed in
9.0≥ 9.0.0, < 9.0.219.0.21
8.5≥ 8.5.0, < 8.5.768.5.76
tomcat
BranchAffectedFixed in
9.0≥ 9.0.0M1, < 9.0.209.0.20
8.5≥ 8.5.0, < 8.5.758.5.75
Oracle agile product lifecycle management
BranchAffectedFixed in
9.3= 9.3.6no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Apache Tomcat to 9.0.21 · 8.5.76

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2026-10-08
  • OpenCVESSVC decisionnone—
  • NVDCVSS 3.18.6read 2026-10-23
  • NVDCVSS 2.07.5read 2026-10-23
  • CNAweakness (CWE)CWE-404read 2026-10-23
  • NVDweakness (CWE)CWE-404read 2026-10-23
  • FIRST EPSSEPSS score8.4 %2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Published
2022-05-13
Last Modified
2026-10-08
NVD status
Modified

Frequently asked questions

What is CVE-2022-25762?

If a web application sends a WebSocket message concurrently with the WebSocket connection closing when running on Apache Tomcat 8.5.0 to 8.5.75 or Apache Tomcat 9.0.0.M1 to 9.0.20, it is possible that the application will continue to use the socket after it has been closed. The error handling triggered in this case could cause the a pooled object to be placed in the pool twice. This could result in subsequent connections using the same object concurrently which could result in data being returned to the wrong use and/or other errors.

Is CVE-2022-25762 actively exploited?

Active exploitation of CVE-2022-25762 has not been confirmed. Its EPSS score was 8.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-25762?

CVE-2022-25762 has a CVSS v3 base score of 8.6 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L.

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