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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.

PUBLISHED Reserved 2026-06-02 | Published 2026-06-09 | Updated 2026-06-09 | Assigner VulnCheck




HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Problem types

Missing Authorization

Product status

Default status
affected

Any version before 0.51.269
affected

Credits

Chia Min Jun Lennon finder

References

github.com/nesquena/hermes-webui/pull/3646 exploit

github.com/nesquena/hermes-webui/releases/tag/v0.51.269 release-notes

github.com/nesquena/hermes-webui/pull/3646 technical-description

github.com/nesquena/hermes-webui/pull/3672 issue-tracking

github.com/...ommit/2c7b530071bb29ae4184e83e33be5799d529568e patch

www.vulncheck.com/...le-isolation-bypass-via-sessions-search third-party-advisory

cve.org (CVE-2026-49956)

nvd.nist.gov (CVE-2026-49956)

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