tinyproxy Integer Overflow in HTTP Chunked Transfer-Encoding Parser Leading to Denial of Service (CVE-2026-3945) | HOL Guard CVE

High · CVSS 7.5CVE-2026-3945

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

Answer in brief

CVE-2026-3945 records a High severity (CVSS 7.5) vulnerability in tinyproxy Integer Overflow in HTTP Chunked Transfer-Encoding Parser Leading to Denial of Service. The current sources do not mark it as known exploited. The current feed maps tinyproxy/tinyproxy (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 30, 2026Updated Aug 10, 2026Source checked Sep 20, 2026First seen by HOL Aug 5, 2026Material review Aug 10, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps tinyproxy/tinyproxy (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
tinyproxy/tinyproxygeneric	<=1.11.3	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for tinyproxy/tinyproxy.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Mar 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source 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).

Quoted source text, attributed separately from HOL analysis.