Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 9.3 | Critical | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0034, the 27th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
Sources
- GitHub Advisory Database: GHSA-m662-56rj-8fmm
- OSV: GHSA-m662-56rj-8fmm
- github.com/prebid/prebid-universal-creative/security/advisories/GHSA-m662-56rj-8fmm
- nvd.nist.gov/vuln/detail/CVE-2025-59039
- github.com/prebid/prebid-universal-creative
- www.sonatype.com/blog/npm-chalk-and-debug-packages-hit-in-software-supply-chain-attack