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  4. CVE 2026 104454 yeswiki before 467 redos via wakkaphp edit
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Back to active CVEs
Medium · CVSS 6.9CVE-2026-104454

YesWiki before 4.6.7 ReDoS via wakka.php Edit-Preview Endpoint

Answer in brief

CVE-2026-104454 records a Medium severity (CVSS 6.9) vulnerability in YesWiki before 4.6.7 ReDoS via wakka.php Edit-Preview Endpoint. 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 2, 2026Updated Oct 2, 2026Source checked Oct 2, 2026First seen by HOL Oct 2, 2026Material review Oct 2, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.9. 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
PackageAffected rangeFixed version
YesWiki/yeswikigeneric>=0 <4.6.74.6.7

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for YesWiki/yeswiki.
  2. 2Review the reported fix. Update YesWiki/yeswiki to 4.6.7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 2, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

YesWiki before 4.6.7 contains an algorithmic-complexity denial of service in the wakka.php formatter due to an O(n^2) markdown-link regex. Unauthenticated attackers can submit a small crafted body of bracket characters to the page-edit preview endpoint to pin PHP-FPM workers and saturate the pool.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • YesWiki before 4.6.7 SQL Injection via nuagetag tags parameterSame yeswiki/yeswiki package
  • YesWiki before 4.6.7 Unauthenticated SSRF via ActivityPub InboxSame yeswiki/yeswiki package
  • YesWiki before 4.6.7 SSRF via Bazar abonnements sync actor parameterSame yeswiki/yeswiki package
  • YesWiki before 4.6.7 Reflected XSS via field Parameter in mail HandlerSame yeswiki/yeswiki package
  • YesWiki before 4.6.7 Stored XSS via Wakka Markdown Image src AttributeSame yeswiki/yeswiki package
  • YesWiki before 4.6.7 Authorization Bypass via Public API ModeSame yeswiki/yeswiki package

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-1333
Source
CVE List V5
Source checked
Oct 2, 2026
References
2 linked sources
Open source record