CVE-2026-103535 CVE-2026-103535
Authenticated attackers can chain path traversal and code injection in the translation editor to achieve remote code execution on Thelia installations.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-103535?
CVE-2026-103535 is a high-severity path traversal vulnerability in Thelia, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Thelia v2.6.1 contains path traversal and PHP code injection vulnerabilities in its translation editor that can be chained to achieve remote code execution. The `item_name` parameter, used to build the translation file's write path, does not sanitize directory traversal sequences such as `../`. This enables an authenticated user with `UPDATE`-level permissions on `admin.configuration.language` to write files outside the expected `templates/` directory, including to web‑accessible paths. Separately, the translation‑writing logic does not escape `\` in user‑supplied values, allowing inputs to break out of the PHP string literal and inject executable code into the translation file. Chained together, these flaws allow a malicious PHP file to be written to a web-accessible path and executed with the web‑server’s privileges.
Which versions are affected by CVE-2026-103535?
How do I fix CVE-2026-103535?
No fix has been published for CVE-2026-103535 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-103535 being exploited?
There is no known exploitation of CVE-2026-103535 in the wild and no public exploit code.
Sources
Also known as GHSA-qv6x-p59r-f4h3.