CVE-2026-3269Public exploitNetwork attack vector

Authenticated session disruption via unchecked bulk expiration

Published Feb 26, 2026 · Updated Feb 26, 2026

Improper authorization in PSI Probe 5.3.0 and earlier allows remote authenticated users to terminate other users' sessions. ExpireSessionsController.handleRequestInternal accepts repeated sid_webapp values and expires each referenced session without checking ownership or requiring an administrative role. Any account with the probeuser role can force logouts across multiple hosted applications in one request and repeat the action to prevent sustained sessions.

CVSS severity4.3
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Improper authorization in PSI Probe 5.3.0 and earlier allows remote authenticated users to terminate other users' sessions. ExpireSessionsController.handleRequestInternal accepts repeated sid_webapp values and expires each referenced session without checking ownership or requiring an administrative role. Any account with the probeuser role can force logouts across multiple hosted applications in one request and repeat the action to prevent sustained sessions.

The record

CVE
CVE-2026-3269
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
PSI Probe
Product
PSI Probe
Classifications
CWE-404, CWE-285, T1531
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0
  2. Affected versionversion=5.1
  3. Affected versionversion=5.2
  4. Affected versionversion=5.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PSI Probe · PSI Probeversion=5.0; version=5.1; version=5.2; version=5.3.0

Published CVSS scores

4.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
4.0VulDBAV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
CWE-285Improper Authorization
T1531Account Access Removal

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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