Vulnerability · Published Aug 28, 2026 · Assigned by GitHub_M

CVE-2026-55509WsgiDAV: Blind SQL injection in the MySQL provider

High 8.8

In plain English

A high-severity SQL injection in wsgidav from mar10. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.8High

Exploit odds (30 days)0.5%top 56.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

WsgiDAV is a generic and extendable WebDAV server based on WSGI. Prior to 4.3.5, the sample MySQLBrowserProvider in wsgidav/samples/mysql_dav_provider.py concatenates the record key parsed from a request URL directly into SQL WHERE clauses. The affected _exists_record_by_primary_key, _get_field_by_primary_key, and _get_record_by_primary_key methods are part of a shipped example provider that is not enabled by default. An attacker who can access a share explicitly configured with this non-default provider can inject SQL through a normal GET request; anonymously exposed read shares permit a status-code oracle and extraction of arbitrary data reachable by the configured MySQL account. This issue is fixed in version 4.3.5.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	wsgidav	4.3.5	GHSA-p6gw-4frg-j7jw
PyPI	wsgidav	4.3.5	PYSEC-2026-3945

Affected products (as reported)

Vendor	Product	Versions
mar10	wsgidav	< 4.3.5

Weakness: CWE-89 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

References

https://github.com/mar10/wsgidav/security/advisories/GHSA-p6gw-4frg-j7jw x_refsource_CONFIRM
https://github.com/mar10/wsgidav/commit/6f35776c9188f130ab044ce557015d51aaa83500 x_refsource_MISC
https://github.com/mar10/wsgidav/blob/master/CHANGELOG.md#435--2026-06-27 x_refsource_MISC
https://github.com/mar10/wsgidav/releases/tag/v4.3.5 x_refsource_MISC