Insufficient input validation in Admin By Request (ABR)

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-78237
StatePUBLISHED
AssignerCSA
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-26 08:16:46 UTC
Updated2026-09-03 16:59:26 UTC
DescriptionInsufficient 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.001340000 probability, percentile 0.032150000 (date 2026-09-07)

Problem Types: CWE-20 | CWE-20 CWE-20 Improper Input Validation

VersionSourceTypeScoreSeverityVector
3.15f57b9bf-260d-4433-bf07-b6a79e9bb7d4Secondary7.8HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1CNACVSS7.8HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Admin By Request ABR Admin By Request ABR affected 5.2.2 and below Not specified

References

ReferenceSourceLinkTags
docs.adminbyrequest.com/security-advisories/abr-mac-26-02.htm 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4 docs.adminbyrequest.com
www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-110 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4 www.csa.gov.sg
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: GovTech Cybersecurity Group (en)

Additional Advisory Data

Solutions

CNA: Users and administrators of affected product versions are advised to update to the latest version promptly.

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