PT-2026-30858 · Unknown · Text-Generation-Webui

Programsurf + 2 · CVE-2026-35485 · Published 2026-04-07 · Updated 2026-04-07

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions text-generation-webui versions prior to 4.3

Description text-generation-webui, an open-source web interface for running Large Language Models, contains a path traversal flaw in the load grammar() function. This allows an unauthenticated attacker to read any file on the server filesystem. The issue arises because the application does not server-side validate dropdown values, enabling attackers to submit directory traversal payloads (e.g., ../../../etc/passwd) via the API. The server then returns the full file contents in the response.

Recommendations Update to version 4.3 or later.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-35485

GHSA-HQG5-487V-5MC6

Affected Products

Text-Generation-Webui

References · 5

• 🔥 https://github.com/oobabooga/text-generation-webui/security/advisories/GHSA-hqg5-487v-5mc6 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35485.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-35485 · Security Note
• https://osv.dev/vulnerability/CVE-2026-35485 · Vendor Advisory
• https://twitter.com/CVEnew/status/2041603229255970992 · Twitter Post