restbed through 5.0.0 Denial of Service via Unbounded Header Buffering (CVE-2026-103471) | HOL Guard CVE

High · CVSS 8.7CVE-2026-103471

restbed through 5.0.0 Denial of Service via Unbounded Header Buffering

Answer in brief

CVE-2026-103471 records a High severity (CVSS 8.7) vulnerability in restbed through 5.0.0 Denial of Service via Unbounded Header Buffering. The current sources do not mark it as known exploited. The current feed maps Corvusoft/restbed (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 Sep 30, 2026Updated Sep 30, 2026Source checked Sep 30, 2026First seen by HOL Sep 30, 2026Material review Sep 30, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.7
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 8.7. 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 Corvusoft/restbed (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Corvusoft/restbedgeneric	>=0 <=5.0.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Corvusoft/restbed.
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
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 30, 2026

Sources and claim methodology

Upstream source description

restbed through 5.0.0 buffers HTTP request headers without enforcing a maximum size limit, allowing remote unauthenticated attackers to exhaust server memory. Attackers can open TCP connections and stream bytes indefinitely without sending the header delimiter, forcing the server to allocate unbounded heap memory until the process is killed.

Quoted source text, attributed separately from HOL analysis.