Security readout for executives and security teams
Plain-English summary
CVE-2026-3269 affects PSI Probe 5.0 through 5.3.0. An authenticated remote user may manipulate the session expiration handler and cause limited denial of service. Public exploit information exists, but the sources do not show active exploitation. No vendor fix is identified in the supplied sources.
Executive priority
Treat as a moderate operational-risk issue. Prioritize PSI Probe instances that are internet-facing, used in production administration, or accessible by many users. Immediate containment through access restriction is reasonable while waiting for clearer vendor remediation guidance.
Technical view
The flaw is reported in handleRequestInternal in ExpireSessionsController.java, within PSI Probe’s Session Handler. VulDB rates it medium with CVSS v4.0 5.3, network attack vector, low complexity, privileges required, and low availability impact. CWE-404 is listed, indicating improper resource shutdown or release.
Likely exposure
Exposure is most relevant where PSI Probe 5.0, 5.1, 5.2, or 5.3.0 is deployed and reachable by authenticated users. Internet-facing or broadly accessible administrative consoles increase operational risk. The CVSS vector indicates privileges are required, reducing unauthenticated exposure.
Exploitation context
The source bundle states the attack can be launched remotely and that exploit material has been published. It does not establish active exploitation, and KEV status is false. Vendor response and official remediation status are unclear in the provided sources.
Researcher notes
Evidence is mainly from VulDB and a public GitHub issue reference. The advisory labels denial of service, while one submission title references broken access control. The record names affected versions through 5.3.0, but the supplied sources do not identify a patched version.
Mitigation direction
- Restrict PSI Probe access to trusted administrators and management networks.
- Remove or disable exposed PSI Probe instances where not operationally required.
- Review user permissions and remove unnecessary PSI Probe access.
- Monitor service health for repeated session-management activity and availability degradation.
- Track PSI Probe vendor or project guidance; apply a fixed release if published.
Validation and detection
- Inventory deployed PSI Probe instances and confirm affected versions.
- Verify whether PSI Probe is reachable from the internet or broad internal networks.
- Confirm only authorized administrators can access session-management functions.
- Review application and proxy logs for unusual session-expiration activity.
- Check cited advisories for updates on fixes, indicators, or clarified impact.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-404: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-3269 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS: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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS: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——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
5.3MediumVector: CVSS: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
Source materials
- CVE List V5 sourceCVE List V5
- VDB-347993 | psi-probe PSI Probe Session ExpireSessionsController.java handleRequestInternal denial of serviceCVE reference · vdb-entry, technical-description
- VDB-347993 | CTI Indicators (IOB, IOC, TTP, IOA)CVE reference · signature, permissions-required
- Submit #758665 | Psi Probe <=5.3.0 Broken Access ControlCVE reference · third-party-advisory
- https://github.com/AnalogyC0de/public_exp/issues/13CVE reference · exploit, issue-tracking
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Resource Shutdown or Release
Improper Resource Shutdown or Release represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.