How severe is CVE-2016-9121?

CVE-2016-9121 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2016-9121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-9121?

CVE-2016-9121 affects Go-jose Project Go-jose. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-9121?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2016-9121 published?

CVE-2016-9121 was published on 2017-03-28 and last updated on 2026-06-17.

CVE-2016-9121

CVE-2016-9121 is a critical-severity vulnerability in Go-jose Project Go-jose with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-326.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-326
Affected product: Go-jose Project Go-jose
Published: 2017-03-28
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2016-9121?: 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 severe is CVE-2016-9121?: CVE-2016-9121 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2016-9121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-9121?: CVE-2016-9121 affects Go-jose Project Go-jose. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-9121?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2016-9121 published?: CVE-2016-9121 was published on 2017-03-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:go-jose_project:go-jose:*:*:*:*:*:*:*:*

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