CVE-2026-104454
YesWiki before 4.6.7 contains an algorithmic-complexity denial of service in the wakka.php…
- Risk score
- 48/100
- CVSS
- 5.3 v3.1
- Exploit chance (30 days)
- 0.4%
- Published
- 2 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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.
- Affected
- See advisory
- Fix
- Upgrade the product to 4.6.7 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 5.3 medium
- On your watchlist: php
References
Original 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.
Last activity 2 Oct 2026. Patch Forecast updates every hour.