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PatchSiren cyber security CVE debrief

CVE-2026-6832 nesquena CVE debrief

CVE-2026-6832 is a HIGH severity vulnerability in Hermes WebUI, with a CVSS score of 7.2. The vulnerability exists in the /api/session/delete endpoint, where authenticated attackers can delete files outside the session directory by supplying an absolute path or path traversal payload in the session_id parameter. This is possible due to unvalidated session identifiers that allow attackers to construct paths bypassing the SESSION_DIR boundary and delete writable JSON files on the host system.

Vendor
nesquena
Product
hermes-webui
CVSS
HIGH 7.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-21
Original CVE updated
2026-06-04
Advisory published
2026-04-21
Advisory updated
2026-06-04

Who should care

Users of Hermes WebUI, particularly those with authenticated access, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by the lack of validation in the session_id parameter of the /api/session/delete endpoint. This allows attackers to delete arbitrary files on the system, potentially leading to data loss or system compromise.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates provided by the vendor to fix the vulnerability.
  • Restrict access to the /api/session/delete endpoint to only trusted users.
  • Monitor system logs for suspicious file deletion activity.

Evidence notes

Evidence for this vulnerability comes from the NVD and CVE.org.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-6832 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-6832

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-6832 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-6832

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.