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CVE-2026-53871

Hermes WebUI < 0.51.368 - Profile-Scoped Authorization Bypass via Forged hermes_profile Cookie

CVSS 4.0 8.6 HIGHCVSS 3.1 8.1 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-53871

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-53871

Published

hermes-webui

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "nesquena",
                    "product": "hermes-webui",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:github/nesquena/hermes-webui",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "0.51.368"
                        },
                        {
                            "version": "0.51.368",
                            "status": "unaffected",
                            "versionType": "semver"
                        }
                    ],
                    "repo": "https://github.com/nesquena/hermes-webui"
                }

Original source record · Cite this exact observation · Complete original publisher JSON