CVE-2026-53871 json
Hermes WebUI < 0.51.368 - Profile-Scoped Authorization Bypass via Forged hermes_profile Cookie
published 4mo ago modified 17d ago also EUVD-2026-37776
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- nesquena hermes-webui 0.51.368
- github.com/nesquena/hermes-webui@9e96f5f commit
- github.com/nesquena/hermes-webui#4023 pull request
- github.com/nesquena/hermes-webui#4036 pull request
- github.com/nesquena/hermes-webui/releases/tag/v0.51.368 release
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 4mo ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.6 | 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 |
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| CNA | 4.0 | 8.6 | 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:X/V:X/RE:X/U:X |
Affected products
- nesquena hermes-webui
Classification
- Weakness
-
- CWE-565 Reliance on Cookies without Validation and Integrity Checking
References
-
github.com
/nesquena/hermes-webui/pull/4023
issue-tracking, patch
-
github.com
/nesquena/hermes-webui/pull/4036
issue-tracking, patch
-
github.com
/nesquena/hermes-webui/commit/9e96f5f6adf93b6d1e27ebddfb4d2833ca06ff3b
patch
-
github.com
/nesquena/hermes-webui/releases/tag/v0.51.368
release-notes
-
vulncheck.com
/advisories/hermes-webui-profile-scoped-authorization-bypass-via-forged-hermes-profile-cookie
third-party-advisory
Sources
- CVE List CVE-2026-53871
- NVD CVE-2026-53871
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.