Vulnerability · Published Feb 22, 2026 · Assigned by VulDB

CVE-2026-2940Zaher1307 tiny_web_server URL tiny.c out-of-bounds write

High 7.3

In plain English

A high-severity out-of-bounds write in tiny_web_server from Zaher1307. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.4%top 68.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Zaher1307	tiny_web_server	8d77b1044a0ca3a5297d8726ac8aa2cf944d481b

Weakness: CWE-787, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-347312 | Zaher1307 tiny_web_server URL tiny.c out-of-bounds write vdb-entry, technical-description
VDB-347312 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #756036 | Zaher1307 TinyWebServer >0.0.0 Stack-based Buffer Overflow third-party-advisory
https://github.com/Zaher1307/tiny_web_server/issues/1 issue-tracking
https://github.com/Zaher1307/tiny_web_server/issues/1#issue-3924357507 exploit, issue-tracking
https://github.com/Zaher1307/tiny_web_server/ product