CVE-2026-30957 json
OneUptime Synthetic Monitor RCE via exposed Playwright browser object
published 2026-03-10 8 mo ago modified 2026-10-07 33 d ago also EUVD-2026-10561 , GHSA-jw8q-gjvg-8w4q
- cvss
- 10.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 70%
- public exploits
- 0
- none known
Summary
OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, OneUptime Synthetic Monitors allow a low-privileged authenticated project user to execute arbitrary commands on the oneuptime-probe server/container. The root cause is that untrusted Synthetic Monitor code is executed inside Node's vm while live host-realm Playwright browser and page objects are exposed to it. A malicious user can call Playwright APIs on the injected browser object and cause the probe to spawn an attacker-controlled executable. This is a server-side remote code execution issue. It does not require a separate vm sandbox escape. This vulnerability is fixed in 10.0.21.
Patch / fix
- npm @oneuptime/common 10.0.21
- hackerbay oneuptime 10.0.21
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 8 mo ago
Exploit prediction
1.30% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/OneUptime/oneuptime/security/advisories/GHSA-jw8q-gjvg-8w4q referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 10.0 | 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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @oneuptime/common | <10.0.21 |
10.0.21 |
Affected products
- OneUptime oneuptime
Classification
- Weakness
-
- CWE-749 Exposed Dangerous Method or Function
References
-
github.com
/OneUptime/oneuptime/security/advisories/GHSA-jw8q-gjvg-8w4q
web, exploit, vendor-advisory
-
github.com
/OneUptime/oneuptime/releases/tag/10.0.21
web, product, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-30957
advisory
-
github.com
/OneUptime/oneuptime
package
Sources
- CVE List CVE-2026-30957
- GitHub Advisory GHSA-jw8q-gjvg-8w4q
- NVD CVE-2026-30957
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.