CVE-2026-104457 YesWiki before 4.6.7 SQL Injection via filtertags filterN parameter
Unauthenticated attackers can inject SQL via the filtertags parameter to read arbitrary database data, including password hashes, in YesWiki.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104457?
CVE-2026-104457 is a high-severity SQL injection vulnerability in yeswiki, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
YesWiki before 4.6.7 contains an SQL injection vulnerability in the Bazar filtertags action, which wraps unescaped filterN attribute tokens in quotes and concatenates them into a raw tags.value IN (...) clause. Unauthenticated attackers on default installs can save filtertags markup in a page with a trailing-backslash token that breaks quote parity under MySQL backslash escaping. This lets them inject a five-column UNION subquery to read arbitrary table data such as password hashes.
Weakness: CWE-89
Which versions are affected by CVE-2026-104457?
How do I fix CVE-2026-104457?
No fix has been published for CVE-2026-104457 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-104457 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-104457 exists.
Sources
Also known as GHSA-f8w7-2q27-5p28, GHSA-p87r-f4x4-8r4g.