CVE-2021-40855 json
The EU Technical Specifications for Digital COVID Certificates before 1.1 mishandle certificate governance.
published 2022-01-21 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-28011
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
The EU Technical Specifications for Digital COVID Certificates before 1.1 mishandle certificate governance. A non-production public key certificate could have been used in production.
Patch / fix
- europa technical_specifications_for_digital_covid_certificates 1.1
Exploit prediction
0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
-
consilium.europa.eu
/en/policies/coronavirus/eu-digital-covid-certificate/
product, vendor-advisory
-
github.com
/eu-digital-green-certificates/dgc-overview/security/advisories/GHSA-xcvc-p4fw-qmcj
third-party-advisory
Sources
- CVE List CVE-2021-40855
- NVD CVE-2021-40855
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.