{"cve":"CVE-2026-33898","nvd":{"published":"2026-03-27T00:16:23.333","modified":"2026-06-17T10:38:16.857","status":"Analyzed","description":"Incus is a system container and virtual machine manager. Prior to version 6.23.0, the web server spawned by `incus webui` incorrectly validates the authentication token such that an invalid value will be accepted. `incus webui` runs a local web server on a random localhost port. For authentication, it provides the user with a URL containing an authentication token. When accessed with that token, Incus creates a cookie persisting that token without needing to include it in subsequent HTTP requests. While the Incus client correctly validates the value of the cookie, it does not correctly validate the token when passed int the URL.\nThis allows for an attacker able to locate and talk to the temporary web server on localhost to have as much access to Incus as the user who ran `incus webui`. This can lead to privilege escalation by another local user or an access to the user's Incus instances and possibly system resources by a remote attack able to trick the local user into interacting with the Incus UI web server. Version 6.23.0 patches the issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-287"],"references":["https://github.com/lxc/incus/security/advisories/GHSA-453r-g2pg-cxxq"],"products":["linuxcontainers:incus"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-33898","score":0.00353,"percentile":0.28981,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-453r-g2pg-cxxq","url":"https://osv.dev/vulnerability/GHSA-453r-g2pg-cxxq","summary":"Local Incus UI web server vulnerable to nuthentication bypass","modified":"2026-04-07T15:26:28.252165301Z","packages":[{"ecosystem":"Go","name":"github.com/lxc/incus/v6/cmd/incus","purl":"pkg:golang/github.com/lxc/incus/v6/cmd/incus","ranges":["<6.23.0"],"fixed":["6.23.0"]}]},{"id":"GO-2026-4879","url":"https://osv.dev/vulnerability/GO-2026-4879","summary":"Local Incus UI web server vulnerable to nuthentication bypass in github.com/lxc/incus","modified":"2026-04-07T15:15:44.006632Z","packages":[{"ecosystem":"Go","name":"github.com/lxc/incus","purl":"pkg:golang/github.com/lxc/incus","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/lxc/incus/v6","purl":"pkg:golang/github.com/lxc/incus/v6","ranges":["<6.23.0"],"fixed":["6.23.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}