Medium
YesWiki before 4.6.7 ReDoS via wakka.php Edit-Preview Endpoint
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.
Announced Source revision 1
Original source ↗CVE-2026-104454
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-104454
yeswiki
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "YesWiki",
"product": "yeswiki",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "4.6.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.6.7",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-104454
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #7979 · Revision 1
- Added to Heist Feed
- Publisher date