CVE-2016-9121
CRITICALEPSS 70th pctlDescription
go-jose before 1.0.4 suffers from an invalid curve attack for the ECDH-ES algorithm. When deriving a shared key using ECDH-ES for an encrypted message, go-jose neglected to check that the received public key on a message is on the same curve as the static private key of the receiver, thus making it vulnerable to an invalid curve attack.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Exploit Intelligence
Elevated risk: more likely to be exploited than 70% of all known CVEs.
References
Related Vulnerabilities
Other CWE-326 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2014-0224 | High | 7.4 | 95% | - | Fix |
| CVE-2017-1000486 | Critical | 9.8 | 94% | KEV | Fix |
| CVE-2013-2566 | Medium | 5.9 | 84% | - | Fix |
| CVE-2017-11317 | Critical | 9.8 | 83% | KEV | - |
| CVE-2018-18325 | High | 7.5 | 74% | KEV | - |
| CVE-2018-15811 | High | 7.5 | 74% | KEV | - |
Common questions
How do I fix CVE-2016-9121?
Upgrade golang-gopkg-square-go-jose.v1 on debian 11 to 1.0.5-1 or later.
Is CVE-2016-9121 being actively exploited?
Not that we know of. CVE-2016-9121 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 70% of all scored CVEs.
How severe is CVE-2016-9121?
CVE-2016-9121 has a CVSS v3 base score of 9.1, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2016-9121 affect?
Published advisories record a fix for golang-gopkg-square-go-jose.v1 (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.