CVE-2026-2940 Zaher1307 tiny_web_server URL tiny.c out-of-bounds write
Remote attackers can trigger an out-of-bounds write in the URL handler of tiny_web_server, potentially leading to code execution or service crashes.
- 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-2026-2940?
CVE-2026-2940 is a medium-severity memory corruption vulnerability in Zaher1307 tiny_web_server, published on 22 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was determined in Zaher1307 tiny_web_server up to 8d77b1044a0ca3a5297d8726ac8aa2cf944d481b. This affects the function tiny_web_server/tiny.c of the file tiny_web_server/tiny.c of the component URL Handler. This manipulation causes out-of-bounds write. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-2940?
How do I fix CVE-2026-2940?
No fix has been published for CVE-2026-2940 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-2940 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2940 exists.
Sources
Also known as GHSA-cv79-qfjv-wpvr.