CVE-2026-78237CWE-20

CVE-2026-78237

High · published August 26, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
3.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00151 · 3.9th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2026-08-26T12:16Z
References (2)
https://docs.adminbyrequest.com/security-advisories/abr-mac-26-02.htm · 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-110/ · 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4
EPSS history
Timeline
  • 27 AUG 06:46Z
    EPSS moved — → 0%
    epss
  • 26 AUG 07:24Z
    Insufficient input validation in Admin By Request (ABR)
    cvelistv5