Is CVE-2016-9121 in the CISA KEV catalog?

No. CVE-2016-9121 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-9121?

CVE-2016-9121 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2016-9121?

CVE-2016-9121 has an EPSS score of 1.41% (69th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-9121?

Upgrade golang-gopkg-square-go-jose.v1 on debian 11 to 1.0.5-1 or later.

CVE & CISA-KEV Catalog

CVE-2016-9121

CRITICAL

9.1

CVSS v3

NVD

Description

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.

CWE-326

How to fix

Remediation Available

golang-gopkg-square-go-jose.v1Debian

Fixed in:1.0.5-1CVE-2016-9121

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

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploit Intelligence

1.41%probability of exploitation in 30 days

69thpercentile

Moderate risk: more likely to be exploited than 69% of all known CVEs.

References

Patch2

Other references1

hackerone.com

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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.