stigmem Federation Peer Registration Authentication Bypass (CVE-2026-76242) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-76242

stigmem Federation Peer Registration Authentication Bypass

Answer in brief

CVE-2026-76242 records a Unknown severity vulnerability in stigmem Federation Peer Registration Authentication Bypass. The current sources do not mark it as known exploited. The current feed maps eidetic-labs/stigmem (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 Aug 19, 2026Updated Aug 19, 2026Source checked Aug 19, 2026First seen by HOL Aug 19, 2026Material review Aug 19, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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 eidetic-labs/stigmem (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
eidetic-labs/stigmemgeneric	>=0 <0.9.0a2	0.9.0a2

Recommended response

Check inventory. Check lockfiles and deployed manifests for eidetic-labs/stigmem.
Review the reported fix. Update eidetic-labs/stigmem to 0.9.0a2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 19, 2026

Sources and claim methodology

Upstream source description

stigmem-node 0.9.0a1 accepts federation peer key material during peer registration without a separate administrator out-of-band fingerprint approval step. On nodes that accept federation peer registration over a network where initial registration can be intercepted or misdirected, an attacker can register a malicious peer and gain access to or tamper with federation traffic. Fixed in 0.9.0a2, which introduces a pending approval flow requiring administrator fingerprint verification before peer tokens are accepted.

Quoted source text, attributed separately from HOL analysis.