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CVE-2026-113352: uTox can overwrite files when auto‑accept is on

CVE-2026-113352 · published 2 days ago

Summary

If you use uTox version 0.18.1 or earlier and have the auto‑accept file transfer feature turned on, a contact can send specially crafted file names that cause the program to write files anywhere on your computer. This could replace important startup scripts or drop malicious code. Disable auto‑accept for file transfers or upgrade to a newer version of uTox that fixes the issue.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software

Vendor	Product	Affected versions
utox	utox	<= 0.18.1

Original advisory text

uTox through 0.18.1 Path Traversal via Auto-Accepted File Transfers

uTox through 0.18.1 contains a path traversal vulnerability that allows Tox friends to write arbitrary files by sending absolute or ../ file names to victims with auto-accept enabled. Attackers can overwrite shell startup files or plant crafted .ftinfo resume records that ft_find_resumeable() loads, abusing FILE pointers to write /proc/self/mem and execute code.

References

https://github.com/uTox/uTox/blob/4b014491560c884b556f082d4d34c5229228bbc5/src/f... Third Party Advisory
https://github.com/uTox/uTox/blob/4b014491560c884b556f082d4d34c5229228bbc5/src/x... Third Party Advisory
https://github.com/uTox/uTox/issues/1587 Third Party Advisory
https://github.com/uTox/uTox/pull/1602 Patch
https://github.com/uTox/uTox/pull/1603 Patch
https://github.com/uTox/uTox Product
https://www.vulncheck.com/advisories/utox-through-0.18.1-path-traversal-via-auto... Vendor Advisory
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-1133... Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-113352 Vendor Advisory

Fix within

Internet-facing 14 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit
Gives an attacker full control

Severity

9.4 Critical

Exploitation

<1% chance of attack within 30 days

Type

CWE-22Path Traversal

Timeline

Published20 Oct 2026

Updated22 Oct 2026

First seen20 Oct 2026

Sources

CVE-2026-113352 · NVD

CVE-2026-113352 · MITRE

CVE-2026-113352 · OSV

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