CVE-2021-3538
Due to insecure randomness in the g.rand.Read function the generated UUIDs are predictable for an attacker.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.31%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A flaw was found in github.com/satori/go.uuid in versions from commit 0ef6afb2f6cdd6cdaeee3885a95099c63f18fc8c to d91630c8510268e75203009fe7daf2b8e1d60c45. Due to insecure randomness in the g.rand.Read function the generated UUIDs are predictable for an attacker.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.31% probability · 83th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-338
- Affected
- satori/uuid
- Source
- secalert@redhat.com
EPSS 2.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1954376Issue Tracking, Third Party Advisory
- https://github.com/satori/go.uuid/issues/73Third Party Advisory
- https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSATORIGOUUID-72488Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1954376Issue Tracking, Third Party Advisory
- https://github.com/satori/go.uuid/issues/73Third Party Advisory
- https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSATORIGOUUID-72488Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.