High · CVSS 7.1CVE-2026-116821

YesWiki before 4.7.0 Read-ACL Bypass via SQL LIKE Wildcards in UsernamesCVE-2026-116821

Answer in brief

CVE-2026-116821 records a High severity (CVSS 7.1) vulnerability in YesWiki before 4.7.0 Read-ACL Bypass via SQL LIKE Wildcards in Usernames. The current sources do not mark it as known exploited. The current feed maps YesWiki/yeswiki (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 27, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps YesWiki/yeswiki (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
YesWiki/yeswikigeneric	>=0 <4.7.0	4.7.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for YesWiki/yeswiki.
Review the reported fix. Update YesWiki/yeswiki to 4.7.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 26, 2026

Sources and claim methodology

Upstream source description

YesWiki before 4.7.0 contains a read-ACL bypass in AclService::updateRequestWithACL, which interpolates usernames into SQL LIKE patterns without escaping the _ and % wildcards. Self-registered attackers can use usernames such as ___ or %%% that over-match ACL tokens, reading pages and Bazar entries restricted to other users or groups via the public Bazar listing API.

Quoted source text, attributed separately from HOL analysis.