CVE-2026-93751 uri-js through 4.4.1 Improper UTF-8 Decoding via pctDecChars
Attackers can bypass validation to inject path traversal or CRLF sequences via improper UTF-8 decoding in the uri-js library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-93751?
CVE-2026-93751 is a medium-severity path traversal vulnerability in garycourt uri-js, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
uri-js through 4.4.1 contains an improper UTF-8 decoding vulnerability in pctDecChars() that decodes invalid and overlong percent-encoded sequences into ASCII metacharacters. Attackers can craft percent-encoded payloads to bypass platform decoder validation and inject path traversal or CRLF sequences that downstream consumers process without filtering.
Weakness: CWE-176
Which versions are affected by CVE-2026-93751?
How do I fix CVE-2026-93751?
No fix has been published for CVE-2026-93751 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-2026-93751 being exploited?
There is no known exploitation of CVE-2026-93751 in the wild and no public exploit code.
Sources
Also known as AZL-103436, DEBIAN-CVE-2026-93751, GHSA-7g43-p94j-qr58, UBUNTU-CVE-2026-93751.