How severe is CVE-2022-31053?

CVE-2022-31053 has a CVSS 3.x base score of 9.8, 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 high.

Is CVE-2022-31053 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-31053?

CVE-2022-31053 primarily affects Biscuitsec Biscuit-auth. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-31053?

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-2022-31053 published?

CVE-2022-31053 was published on 2022-06-13 and last updated on 2026-06-17.

CVE-2022-31053

CVE-2022-31053 is a critical-severity vulnerability in Biscuitsec Biscuit-auth with a CVSS 3.x base score of 9.8. 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-347.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Biscuitsec Biscuit-auth
Published: 2022-06-13
Last modified: 2026-06-17

Description

Biscuit is an authentication and authorization token for microservices architectures. The Biscuit specification version 1 contains a vulnerable algorithm that allows malicious actors to forge valid Γ-signatures. Such an attack would allow an attacker to create a token with any access level. The version 2 of the specification mandates a different algorithm than gamma signatures and as such is not affected by this vulnerability. The Biscuit implementations in Rust, Haskell, Go, Java and Javascript all have published versions following the v2 specification. There are no known workarounds for this issue.

Frequently asked questions

What is CVE-2022-31053?: Biscuit is an authentication and authorization token for microservices architectures. The Biscuit specification version 1 contains a vulnerable algorithm that allows malicious actors to forge valid Γ-signatures. Such an attack would allow an attacker to create a token with any access level. The version 2 of the specification mandates a different algorithm than gamma signatures and as such is not affected by this vulnerability. The Biscuit implementations in Rust, Haskell, Go, Java and Javascript all have published versions following the v2 specification. There are no known workarounds for this issue.
How severe is CVE-2022-31053?: CVE-2022-31053 has a CVSS 3.x base score of 9.8, 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 high.
Is CVE-2022-31053 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-31053?: CVE-2022-31053 primarily affects Biscuitsec Biscuit-auth. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-31053?: 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-2022-31053 published?: CVE-2022-31053 was published on 2022-06-13 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:biscuitsec:biscuit-auth:*:*:*:*:*:rust:*:*
cpe:2.3:a:biscuitsec:biscuit-go:*:*:*:*:*:*:*:*
cpe:2.3:a:biscuitsec:biscuit-haskell:0.1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:clever-cloud:biscuit-java:*:*:*:*:*:*:*:*

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