Medium · CVSS 3.7CVE-2026-77151

lin-snow Ech0 crypto.go MD5Encrypt risky encryptionCVE-2026-77151

Answer in brief

CVE-2026-77151 records a Medium severity (CVSS 3.7) vulnerability in lin-snow Ech0 crypto.go MD5Encrypt risky encryption. The current sources do not mark it as known exploited. The current feed maps lin-snow/Ech0 (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 20, 2026Updated Aug 24, 2026Source checked Oct 5, 2026First seen by HOL Aug 20, 2026Material review Aug 24, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 3.7
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 3.7. 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 lin-snow/Ech0 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
lin-snow/Ech0generic	5.4.0 \|\| 5.4.1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for lin-snow/Ech0.
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
Aug 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 20, 2026

Sources and claim methodology

Upstream source description

A security flaw has been discovered in lin-snow Ech0 up to 5.4.1. Affected by this issue is the function MD5Encrypt of the file internal/util/crypto/crypto.go. Performing a manipulation results in risky cryptographic algorithm. Remote exploitation of the attack is possible. The complexity of an attack is rather high. The exploitation is known to be difficult. Upgrading to version 5.4.2 can resolve this issue. The patch is named 9ce19a3b0d0765086a655f45d3a706ec1810404f. It is recommended to upgrade the affected component.

Quoted source text, attributed separately from HOL analysis.