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Vulnerability record · CVE-2026-53871 · published 17 June 2026

CVE-2026-53871: Reliance on cookies without validation vulnerability

Hermes WebUI before 0.51.368 contains an authorization bypass vulnerability in the get_profile_cookie() function that accepts unauthenticated profile names from the hermes_profile cookie. An authenticated attacker can forge the hermes_profile cookie value to bypass profile-scoped authorization checks and access sessions, files, and resources across different profiles.

8.6 CVSS 4.0 High EPSS 0.50% · top 59.5% CWE-565 · Reliance on cookies without validation Deferred
8.6CVSS 4.0 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
17 Sep 2026Last modified by NVD

Description

Hermes WebUI before 0.51.368 contains an authorization bypass vulnerability in the get_profile_cookie() function that accepts unauthenticated profile names from the hermes_profile cookie. An authenticated attacker can forge the hermes_profile cookie value to bypass profile-scoped authorization checks and access sessions, files, and resources across different profiles.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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/9e96f5f6adf93b6d1e27ebddfb4d2833ca06ff3b
https://github.com/nesquena/hermes-webui/pull/4023
https://github.com/nesquena/hermes-webui/pull/4036
https://github.com/nesquena/hermes-webui/releases/tag/v0.51.368
https://www.vulncheck.com/advisories/hermes-webui-profile-scoped-authorization-bypass-via-forged-hermes-profile-cookie

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2026-0257PAN-OS GlobalProtect authentication bypass via unvalidated cookiesPAN-OS GlobalProtect portal and gateway contain authentication bypass flaws that let an attacker skip security restrictions and establish an unauthor…KEVEPSS 96%analysed

Source: NIST National Vulnerability Database (record CVE-2026-53871), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.