Insufficient input validation in Admin By Request (ABR) (CVE-2026-78237) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-78237

Insufficient input validation in Admin By Request (ABR)

Answer in brief

CVE-2026-78237 records a Unknown severity vulnerability in Insufficient input validation in Admin By Request (ABR). The current sources do not mark it as known exploited. The current feed maps Admin By Request (ABR)/Admin By Request (ABR) (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 26, 2026Updated Aug 26, 2026Source checked Aug 26, 2026First seen by HOL Aug 26, 2026Material review Aug 26, 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: Not reported

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 Admin By Request (ABR)/Admin By Request (ABR) (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Admin By Request (ABR)/Admin By Request (ABR)generic	5.2.2 and below	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Admin By Request (ABR)/Admin By Request (ABR).
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 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 26, 2026

Sources and claim methodology

Upstream source description

Insufficient input validation in ABR allows a low-privileged user to inject malicious entries into the sudoers file, resulting in persistent root access that remained effective after the ABR session ended.

Quoted source text, attributed separately from HOL analysis.