WsgiDAV: Blind SQL injection in the MySQL provider
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- SQL injection
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-89.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| mar10 | wsgidav | before 4.3.5 | 4.3.5 | Patch available | CNA |
| — | WsgiDAV (PyPI) | before 4.3.5 | 4.3.5 | Patch available | GHSA-p6gw-4frg-j7jw |
- wsgidav Vendormar10 Affected before 4.3.5 Fixed in 4.3.5 Patch available CNA
- WsgiDAV (PyPI) Vendor— Affected before 4.3.5 Fixed in 4.3.5 Patch available GHSA-p6gw-4frg-j7jw
Remediation
- Fix · CNA wsgidav (mar10) Fixed in 4.3.5
- Fix · GHSA-p6gw-4frg-j7jw WsgiDAV (PyPI) Fixed in 4.3.5 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-55509
- 2026-10-03 Alias added: GHSA-p6gw-4frg-j7jw
References
Other 5
- https://github.com/mar10/wsgidav/security/advisories/GHSA-p6gw-4frg-j7jw
- https://github.com/mar10/wsgidav/commit/6f35776c9188f130ab044ce557015d51aaa83500
- https://github.com/mar10/wsgidav/blob/master/CHANGELOG.md#435--2026-06-27
- https://github.com/mar10/wsgidav/releases/tag/v4.3.5
- https://github.com/mar10/wsgidav
More mar10 vulnerabilities
- TI-2026-35539 WsgiDAV encoded dot segments can escape filesystem share roots CVSS 3.1HIGH 7.1
Sources
- CVE-2026-55509 · CVE Program
- CVE-2026-55509 · NVD
- FIRST EPSS
- GHSA-p6gw-4frg-j7jw · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences