How severe is CVE-2024-23656?

CVE-2024-23656 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2024-23656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-23656?

CVE-2024-23656 affects Linuxfoundation Dex. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-23656?

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

Does CVE-2024-23656 have an EU (EUVD) identifier?

Yes. CVE-2024-23656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0360.

When was CVE-2024-23656 published?

CVE-2024-23656 was published on 2024-01-25 and last updated on 2026-06-17.

CVE-2024-23656

CVE-2024-23656 is a high-severity vulnerability in Linuxfoundation Dex with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-0360
Weakness: CWE-326
Affected product: Linuxfoundation Dex
Published: 2024-01-25
Last modified: 2026-06-17

Description

Dex is an identity service that uses OpenID Connect to drive authentication for other apps. Dex 2.37.0 serves HTTPS with insecure TLS 1.0 and TLS 1.1. `cmd/dex/serve.go` line 425 seemingly sets TLS 1.2 as minimum version, but the whole `tlsConfig` is ignored after `TLS cert reloader` was introduced in v2.37.0. Configured cipher suites are not respected either. This issue is fixed in Dex 2.38.0.

Frequently asked questions

What is CVE-2024-23656?: Dex is an identity service that uses OpenID Connect to drive authentication for other apps. Dex 2.37.0 serves HTTPS with insecure TLS 1.0 and TLS 1.1. `cmd/dex/serve.go` line 425 seemingly sets TLS 1.2 as minimum version, but the whole `tlsConfig` is ignored after `TLS cert reloader` was introduced in v2.37.0. Configured cipher suites are not respected either. This issue is fixed in Dex 2.38.0.
How severe is CVE-2024-23656?: CVE-2024-23656 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2024-23656 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-23656?: CVE-2024-23656 affects Linuxfoundation Dex. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-23656?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-23656 have an EU (EUVD) identifier?: Yes. CVE-2024-23656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0360.
When was CVE-2024-23656 published?: CVE-2024-23656 was published on 2024-01-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:linuxfoundation:dex:2.37.0:*:*:*:*:*:*:*

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