High severity · published Apr 7, 2026
CVE-2026-35485
text-generation-webui has a Path Traversal in load_grammar() — arbitrary file read without authentication
7.5
CVSS
0.7%
EPSS
No
On KEV
Description
text-generation-webui is an open-source web interface for running Large Language Models. Prior to 4.3, an unauthenticated path traversal vulnerability in load_grammar() allows reading any file on the server filesystem with no extension restriction. Gradio does not server-side validate dropdown values, so an attacker can POST directory traversal payloads (e.g., ../../../etc/passwd) via the API and receive the full file contents in the response. This vulnerability is fixed in 4.3.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TE
text-generation-webui · oobabooga
< 4.3 · source: vendor
TE
Textgen · Oobabooga
before 4.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35485
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35485
Exploit
https://github.com/oobabooga/text-generation-webui/security/advisories/GHSA-hqg5-487v-5mc6
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