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Vulnerability record · CVE-2026-49956 · published 9 June 2026

CVE-2026-49956: Missing authorization vulnerability

Hermes WebUI before version 0.51.269 contains a profile isolation bypass vulnerability that allows authenticated users to access data belonging to other profiles by querying the session search endpoint without active-profile filtering. Attackers can send requests to the sessions search handler to retrieve session titles and transcript message content from profiles other than their own active profile.

7.1 CVSS 4.0 High EPSS 0.47% · top 61.5% CWE-862 · Missing authorization Deferred
7.1CVSS 4.0 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
6References
23 Jul 2026Last modified by NVD

Description

Hermes WebUI before version 0.51.269 contains a profile isolation bypass vulnerability that allows authenticated users to access data belonging to other profiles by querying the session search endpoint without active-profile filtering. Attackers can send requests to the sessions search handler to retrieve session titles and transcript message content from profiles other than their own active profile.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/nesquena/hermes-webui/commit/2c7b530071bb29ae4184e83e33be5799d529568e
https://github.com/nesquena/hermes-webui/pull/3646
https://github.com/nesquena/hermes-webui/pull/3672
https://github.com/nesquena/hermes-webui/releases/tag/v0.51.269
https://www.vulncheck.com/advisories/hermes-webui-profile-isolation-bypass-via-sessions-search
https://github.com/nesquena/hermes-webui/pull/3646

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Source: NIST National Vulnerability Database (record CVE-2026-49956), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.