SIPGO: DoS via unvalidated Content-Length in the stream parser (CVE-2026-58268) | HOL Guard CVE

High · CVSS 7.5CVE-2026-58268GHSA-PG59-5VWG-4JXQ

SIPGO: DoS via unvalidated Content-Length in the stream parser

Answer in brief

CVE-2026-58268 records a High severity (CVSS 7.5) vulnerability in SIPGO: DoS via unvalidated Content-Length in the stream parser. The current sources do not mark it as known exploited. The current feed maps emiago/sipgo (generic), github.com/emiago/sipgo (go), github.com/emiago/sipgo (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

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

Published Sep 22, 2026Updated Sep 22, 2026Source checked Sep 22, 2026First seen by HOL Sep 22, 2026Material review Sep 22, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

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 emiago/sipgo (generic), github.com/emiago/sipgo (go), github.com/emiago/sipgo (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
emiago/sipgogeneric	<1.4.1	1.4.1
github.com/emiago/sipgogo	<=1.4.0	1.4.1
github.com/emiago/sipgogo	>=0 <1.4.1	1.4.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for emiago/sipgo, github.com/emiago/sipgo, github.com/emiago/sipgo.
Review the reported fix. Update emiago/sipgo to 1.4.1; github.com/emiago/sipgo to 1.4.1; github.com/emiago/sipgo to 1.4.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 22, 2026

Sources and claim methodology

Upstream source description

SIPGO is a library for writing SIP services in the GO language. Prior to 1.4.1, ParserStream.parseSingle in sip/parser_stream.go allocates a SIP body buffer from the client-controlled Content-Length header before ParseMaxMessageLength is enforced. An unauthenticated peer can send a stream-transport message over TCP, TLS, WS, or WSS with an oversized declared length, causing excessive memory allocation and denial of service before the body is read. This issue is fixed in version 1.4.1.

Quoted source text, attributed separately from HOL analysis.