# CVE-2026-104469: YesWiki session fixation in login

Source: https://junglewise.ai/threats/cve-2026-104469-yeswiki-before-4-6-7-contains-a-session-fixation-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-02. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-104469 · Severity: medium · CVSS 6.8 · Published 2026-10-02

YesWiki is a collaborative wiki platform that stores user sessions via PHP cookies. The login process fails to rotate the session ID after authentication, allowing attackers who know or set a victim's session cookie before login to reuse it afterward and hijack the authenticated account. An attacker can then access private pages and perform administrative actions as the victim.

Technologies: [YesWiki](https://junglewise.ai/threats/technologies/yeswiki). Vendors: [YesWiki](https://junglewise.ai/threats/vendors/yeswiki).

## Quick answers

**Is CVE-2026-104469 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-104469 being exploited in the wild.

**How severe is CVE-2026-104469?** Medium severity, with a CVSS score of 6.8, published 2 October 2026.

**Which products and versions are affected?** YesWiki before 4.6.7.

**Is there a fix for CVE-2026-104469?** Yes: fixed in 4.6.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-104469 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-104469?** Check whether you run YesWiki at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 4.6.7

## Technical details

YesWiki starts a PHP session before authentication and stores the authenticated user in the existing session during login without calling session_regenerate_id(). An attacker who can set or learn a victim's pre-authentication YesWiki-* cookie can reuse the same session ID after the victim logs in. Attack vectors include subdomain cookie tossing, shared/local browser access, or other session injection primitives, requiring user interaction (the victim must log in).

## Affected products

- YesWiki YesWiki before 4.6.7

## Timeline

- 2026-09-01: disclosed
- 2026-10-02: advisory

## References

- [https://github.com/YesWiki/yeswiki/security/advisories/GHSA-7fvc-v2hp-5pwh](https://github.com/YesWiki/yeswiki/security/advisories/GHSA-7fvc-v2hp-5pwh)
- [https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-session-fixation-via-login-in-authcontroller-php](https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-session-fixation-via-login-in-authcontroller-php)

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- [YesWiki stored cross-site scripting in referrers_sites handler](https://junglewise.ai/threats/cve-2026-116824-yeswiki-before-4-7-0-contains-a-stored-cross-site-scripting)