{"answers":{"affected":"2 open source packages ship an affected version, including sillytavern.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44649 exists.","fix":"Upgrade sillytavern to 1.18.0 or later.","what":"CVE-2026-44649 is a critical authentication bypass vulnerability in SillyTavern, published on 29 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-44649 and fix it if it is affected.\n\nWhat it is: CVE-2026-44649 is a critical authentication bypass vulnerability in SillyTavern, published on 29 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44649 exists.\n\nAffected packages and fixed versions:\n- sillytavern (npm): affected all versions; fixed in 1.18.0\n- sillytavern (npm): affected all versions; fixed in 1.18.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-44649/ (Markdown: https://insights.sbomify.com/CVE-2026-44649/index.md)","id":"CVE-2026-44649","markdown":"https://insights.sbomify.com/CVE-2026-44649/index.md","name":"CVE-2026-44649","record":{"aliases":["GHSA-gxx6-h3g6-vwjh"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["privilege_escalation","account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"LLM user interface","requires_auth":"none","summary":"Attackers can bypass authentication and gain admin access by injecting SSO headers when SSO is enabled, allowing full control of the SillyTavern instance.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-807","name":"Reliance on Untrusted Inputs in a Security Decision"},{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"},{"id":"CWE-346","name":"Origin Validation Error"},{"id":"CWE-290","name":"Authentication Bypass by Spoofing"}],"description":"SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to 1.18.0, SillyTavern accepts Remote-User (Authelia) and X-Authentik-Username (Authentik) HTTP headers to automatically log in users when SSO is configured. There is no validation that these headers originate from a trusted reverse proxy. Any network client that can reach the SillyTavern port directly can inject these headers and authenticate as any user, including administrators, without a password. This vulnerability is exploitable only when sso.autheliaAuth: true or sso.authentikAuth: true is set in config.yaml (both default to false). This vulnerability is fixed in 1.18.0.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"SillyTavern: Authentication Bypass via SSO Header Injection","id":"CVE-2026-44649","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"SillyTavern: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","id":"CVE-2026-44650"},"packages":[{"ecosystem":"npm","fixed":["1.18.0"],"introduced":["0"],"last_affected":[],"package":"sillytavern","purl":null,"source":"GHSA-gxx6-h3g6-vwjh"},{"ecosystem":"npm","fixed":["1.18.0"],"introduced":["0"],"last_affected":[],"package":"sillytavern","purl":"pkg:npm/sillytavern","source":"GHSA-gxx6-h3g6-vwjh"}],"prev":{"headline":"SillyTavern: Existing sessions are not invalidated after password change, allowing session reuse and account takeover","id":"CVE-2026-44648"},"products":["SillyTavern"],"published":"2026-05-29","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-02","vendors":["SillyTavern"]},"summary":"Attackers can bypass authentication and gain admin access by injecting SSO headers when SSO is enabled, allowing full control of the SillyTavern instance.","url":"https://insights.sbomify.com/CVE-2026-44649/"}