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Vulnerability record · CVE-2026-55509 · published 28 August 2026

CVE-2026-55509: SQL injection vulnerability

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.

8.8 CVSS 4.0 High EPSS 0.54% · top 56.7% CWE-89 · SQL injection Deferred
8.8CVSS 4.0 base score
0.54%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
9 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-55509), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.