# CVE-2026-52775: YesWiki authenticated SQL injection in ReactionManager

Source: https://junglewise.ai/threats/cve-2026-52775-yeswiki-authenticated-sql-injection-in-reactionmanager  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-05. Updated: 2026-07-09  
License: CC BY 4.0 with a link back

CVE-2026-52775 · Severity: high · CVSS 8.8 · Published 2026-09-05

YesWiki, a collaborative wiki platform, contains a security flaw that allows registered users to interfere with the site's database. By sending specially crafted requests to the reactions API, an attacker can bypass security controls to read or modify sensitive information, including user password hashes and emails. This could lead to a full compromise of the wiki's data and user accounts.

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

## Quick answers

**Is CVE-2026-52775 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-52775 being exploited in the wild.

**How severe is CVE-2026-52775?** High severity, with a CVSS score of 8.8, published 5 September 2026.

**Which products and versions are affected?** yeswiki/yeswiki (Packagist) < 4.6.6, ECOSYSTEM:introduced=0,fixed=4.6.6; YesWiki < 4.6.6.

**Is there a fix for CVE-2026-52775?** Yes. yeswiki/yeswiki (Packagist): upgrade to 4.6.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-52775 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-52775?** Check whether you run yeswiki/yeswiki (Packagist) or 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

- yeswiki/yeswiki (Packagist): upgrade to 4.6.6 or later

  ```sh
  composer require yeswiki/yeswiki:^4.6.6
  ```


## Technical details

An authenticated SQL injection vulnerability exists in YesWiki's `ReactionManager::deleteUserReaction()` function. The root cause is the direct concatenation of the `{idreaction}` and `{id}` URL path parameters into a SQL LIKE clause within the `TripleStore::delete()` method without proper escaping or parameterization. While one code path in the component correctly uses `$this->dbService->escape()`, an alternative branch fails to do so. An attacker with any level of authenticated access can exploit this via a DELETE request to the `/api/reactions/` endpoint to perform time-based blind SQL injection, enabling full database read/write access. The issue is patched in version 4.6.6.

## Affected products

- YesWiki YesWiki < 4.6.6

## Identifiers

- CVE-2026-52775
- GHSA-4pf7-cc4r-g63h

## Timeline

- 2026-06-02: disclosed: Initial disclosure and commit fix
- 2026-07-09: advisory: GitHub Advisory published

## References

- [https://api.github.com/users/SnailSploit](https://api.github.com/users/SnailSploit)
- [https://github.com/SnailSploit](https://github.com/SnailSploit)
- [https://api.github.com/users/SnailSploit/gists%7B/gist_id%7D](https://api.github.com/users/SnailSploit/gists%7B/gist_id%7D)
- [https://api.github.com/users/SnailSploit/repos](https://api.github.com/users/SnailSploit/repos)
- [https://avatars.githubusercontent.com/u/95986478?v=4](https://avatars.githubusercontent.com/u/95986478?v=4)
- [https://api.github.com/users/SnailSploit/events%7B/privacy%7D](https://api.github.com/users/SnailSploit/events%7B/privacy%7D)

## Related threats

- [YesWiki SQL injection in despam.php INTERVAL operand](https://junglewise.ai/threats/cve-2026-116828-yeswiki-before-4-7-0-contains-a-sql-injection-vulnerability-in)
- [YesWiki server-side request forgery in Bazar CSV import](https://junglewise.ai/threats/cve-2026-116827-yeswiki-before-4-7-0-contains-a-server-side-request-forgery)
- [YesWiki server-side request forgery in DuplicationManager](https://junglewise.ai/threats/cve-2026-116826-yeswiki-before-4-7-0-contains-a-server-side-request-forgery)
- [YesWiki HTTP Signature replay protection missing in ActivityPub inbox](https://junglewise.ai/threats/cve-2026-116825-yeswiki-from-4-6-2-before-4-7-0-lacks-replay-protection-in)
- [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)