CVE-2026-3945

high

Description

An integer overflow vulnerability in the HTTP chunked transfer encoding parser in tinyproxy up to and including version 1.11.3 allows an unauthenticated remote attacker to cause a denial of service (DoS). The issue occurs because chunk size values are parsed using strtol without properly validating overflow conditions (e.g., errno == ERANGE).

References

https://github.com/tinyproxy/tinyproxy/releases

https://github.com/tinyproxy/tinyproxy/pull/603

https://github.com/tinyproxy/tinyproxy/issues/602

https://github.com/tinyproxy/tinyproxy/commit/bb7edc4

https://github.com/tinyproxy/tinyproxy/commit/969852c

Details

Source: Mitre, NVD

Published: 2026-03-30

Updated: 2026-08-10

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

CVSS v4

Base Score: 8.7

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00048