Security Digest · Vulnerability record
CVE-2026-27728: OneUptime: OS Command Injection in Probe NetworkPathMonitor via unsanitized destination in traceroute exec()
OneUptime is a solution for monitoring and managing online services.
CVSS 10.0 Critical EPSS 2.6% · p85
Should you act?
Critical, preconditions apply
Severe if exploited, but exploitation needs conditions that may not apply to you. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Not in CISA KEV, but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 2.6%, percentile 85: FIRST’s model estimates a 2.6% chance of exploitation activity in the next 30 days, higher than 85% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes
@oneuptime/common(npm) < 10.0.7, fixed in 10.0.7. Check your lockfile, including transitive dependencies.
What it is
OneUptime is a solution for monitoring and managing online services. Prior to version 10.0.7, an OS command injection vulnerability in NetworkPathMonitor.performTraceroute() allows any authenticated project user to execute arbitrary operating system commands on the Probe server by injecting shell metacharacters into a monitor's destination field. Version 10.0.7 fixes the vulnerability.
From the GitHub advisory
Summary
An OS command injection vulnerability in NetworkPathMonitor.performTraceroute() allows any authenticated project user to execute arbitrary operating system commands on the Probe server by injecting shell metacharacters into a monitor's destination field.
Details
The vulnerability exists in Probe/Utils/Monitors/MonitorTypes/NetworkPathMonitor.ts, lines 149–191.
The performTraceroute() method constructs a shell command by directly interpolating the user-controlled destination parameter into a string template, then executes it via childprocess.exec() (wrapped through promisify):
Weakness type: CWE-78.
Product: @oneuptime/common (npm) · Assigned by: GitHub_M · Published: 2026-02-25
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| npm | @oneuptime/common | < 10.0.7 | 10.0.7 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| OneUptime | oneuptime | < 10.0.7 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_M | 3.1 | 10 Critical | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| GitHub | 3.1 | 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: low (any account)
- User interaction: none
- Scope: changed (can affect other components)
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 2.60% probability of exploitation activity in the next 30 days; percentile 85.
Timeline
- — CVE record last updated
- — CVE record published by GitHub_M
- — GitHub-reviewed advisory GHSA-jmhp-5558-qxh5 published (critical)
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-jmhp-5558-qxh5 github.com
- CVE.org record CVE-2026-27728 cve.org
- NVD entry CVE-2026-27728 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com
- github.com github.com