What’s Vulnerable › Vulnerabilities

CVE-2026-48099: WsgiDAV encoded dot segments can escape filesystem share roots

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-13 · updated 2026-09-09
• Weakness: CWE-22

Description

WsgiDAV is a generic and extendable WebDAV server based on WSGI. WsgiDAV 4.3.3 and prior can allow a WebDAV request path containing an encoded parent-directory segment to escape the configured filesystem share root in a specific path layout. The issue is fixed with version 4.3.4.

Affected products

• mar10 wsgidav: before 4.3.4

References

• https://github.com/mar10/wsgidav/commit/f894ed8656d7bdd7438ab8148c5a02546cb15183
• https://github.com/mar10/wsgidav/security/advisories/GHSA-wxq4-cc2q-338q
• https://github.com/pypa/advisory-database/tree/main/vulns/wsgidav/PYSEC-2026-3428.yaml

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