How severe is CVE-2023-23928?

CVE-2023-23928 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability none.

Is CVE-2023-23928 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-23928?

CVE-2023-23928 affects Reason-jose Project Reason-jose. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-23928?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-23928 published?

CVE-2023-23928 was published on 2023-02-01 and last updated on 2026-06-17.

CVE-2023-23928

CVE-2023-23928 is a medium-severity vulnerability in Reason-jose Project Reason-jose with a CVSS 3.x base score of 5.9. 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: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Reason-jose Project Reason-jose
Published: 2023-02-01
Last modified: 2026-06-17

Description

reason-jose is a JOSE implementation in ReasonML and OCaml.`Jose.Jws.validate` does not check HS256 signatures. This allows tampering of JWS header and payload data if the service does not perform additional checks. Such tampering could expose applications using reason-jose to authorization bypass. Applications relying on JWS claims assertion to enforce security boundaries may be vulnerable to privilege escalation. This issue has been patched in version 0.8.2.

Frequently asked questions

What is CVE-2023-23928?: reason-jose is a JOSE implementation in ReasonML and OCaml.`Jose.Jws.validate` does not check HS256 signatures. This allows tampering of JWS header and payload data if the service does not perform additional checks. Such tampering could expose applications using reason-jose to authorization bypass. Applications relying on JWS claims assertion to enforce security boundaries may be vulnerable to privilege escalation. This issue has been patched in version 0.8.2.
How severe is CVE-2023-23928?: CVE-2023-23928 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability none.
Is CVE-2023-23928 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-23928?: CVE-2023-23928 affects Reason-jose Project Reason-jose. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-23928?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-23928 published?: CVE-2023-23928 was published on 2023-02-01 and last updated on 2026-06-17.

References

Affected products (1)

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

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