8.7

CVE-2026-3945

tinyproxy Integer Overflow in HTTP Chunked Transfer-Encoding Parser Leading to Denial of Service

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).
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
Herstellertinyproxy
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Produkt tinyproxy
Default Statusunaffected
Version <=1.11.3
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.58% 0.445
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c 8.7 0 0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c 7.8 10 6.9
AV:N/AC:L/Au:N/C:N/I:N/A:C
CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

https://github.com/tinyproxy/tinyproxy/issues/602
https://github.com/tinyproxy/tinyproxy/pull/603
https://github.com/tinyproxy/tinyproxy/commit/969852c
https://github.com/tinyproxy/tinyproxy/commit/bb7edc4
https://github.com/tinyproxy/tinyproxy/releases