CVE-2021-3908 json
Infinite certificate chain depth results in OctoRPKI running forever
published 2021-11-10 4 y ago modified 2026-07-08 4 mo ago also GHSA-g5gj-9ggf-9vmq , GO-2022-0249 , EUVD-2021-2345
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
OctoRPKI does not limit the depth of a certificate chain, allowing for a CA to create children in an ad-hoc fashion, thereby making tree traversal never end.
Patch / fix
- go github.com/cloudflare/cfrpki 1.4.0
- Cloudflare octorpki 1.4.0
- cfrpki Debian 12 1.4.0-1
debian advisories DEBIAN-CVE-2021-3908
Exploit prediction
0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| GitHub | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/cloudflare/cfrpki | <1.4.0 |
1.4.0 |
Affected products
- Cloudflare octorpki
Classification
References
-
debian.org
/security/2022/dsa-5041
vendor-advisory, web, third-party-advisory
-
github.com
/cloudflare/cfrpki/security/advisories/GHSA-g5gj-9ggf-9vmq
web, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-3908
advisory
-
github.com
/cloudflare/cfrpki
package
-
github.com
/cloudflare/cfrpki/releases/tag/v1.4.0
web
Sources
- CVE List CVE-2021-3908
- GitHub Advisory GHSA-g5gj-9ggf-9vmq
- NVD CVE-2021-3908
- OSV GO-2022-0249
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.