MEDIUM

CVE-2026-55197

2026-06-17 CVSS v3.1

CVSS

6.5

Description

Hermes WebUI before 0.51.443 contains a broken access control vulnerability in the /api/session endpoint that allows authenticated users to disclose cross-profile session transcripts. Attackers can bypass profile boundary checks by directly querying session IDs belonging to other profiles via GET /api/session?session_id=<foreign_id>&messages=1 to retrieve unauthorized conversation transcripts and metadata.

Weakness (CWE)

CWE-639 Authorization Bypass (IDOR)

EPSS Score

0.27%

Probability of exploitation in next 30 days

19.8th percentile

References

https://github.com/nesquena/hermes-webui/commit/2a3baa71b81ca92da8ece8616a09f15894beec71 https://github.com/nesquena/hermes-webui/pull/3982 https://github.com/nesquena/hermes-webui/pull/4269 https://github.com/nesquena/hermes-webui/releases/tag/v0.51.443 https://www.vulncheck.com/advisories/hermes-webui-broken-access-control-in-api-session-endpoint

View on dbcve.org

Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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