How severe is CVE-2024-42487?

CVE-2024-42487 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2024-42487 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-42487?

CVE-2024-42487 primarily affects Cilium. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-42487?

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

Does CVE-2024-42487 have an EU (EUVD) identifier?

Yes. CVE-2024-42487 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2632.

When was CVE-2024-42487 published?

CVE-2024-42487 was published on 2024-08-15 and last updated on 2026-06-17.

CVE-2024-42487

CVE-2024-42487 is a medium-severity vulnerability in Cilium with a CVSS 3.x base score of 4.0. 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-436.

Key facts

Severity: Medium (CVSS 3.x base score 4.0)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-2632
Weakness: CWE-436
Affected product: Cilium
Published: 2024-08-15
Last modified: 2026-06-17

Description

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. In the 1.15 branch prior to 1.15.8 and the 1.16 branch prior to 1.16.1, Gateway API HTTPRoutes and GRPCRoutes do not follow the match precedence specified in the Gateway API specification. In particular, request headers are matched before request methods, when the specification describes that the request methods must be respected before headers are matched. This could result in unexpected behaviour with security This issue is fixed in Cilium v1.15.8 and v1.16.1. There is no workaround for this issue.

Frequently asked questions

What is CVE-2024-42487?: Cilium is a networking, observability, and security solution with an eBPF-based dataplane. In the 1.15 branch prior to 1.15.8 and the 1.16 branch prior to 1.16.1, Gateway API HTTPRoutes and GRPCRoutes do not follow the match precedence specified in the Gateway API specification. In particular, request headers are matched before request methods, when the specification describes that the request methods must be respected before headers are matched. This could result in unexpected behaviour with security This issue is fixed in Cilium v1.15.8 and v1.16.1. There is no workaround for this issue.
How severe is CVE-2024-42487?: CVE-2024-42487 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2024-42487 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-42487?: CVE-2024-42487 primarily affects Cilium. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-42487?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-42487 have an EU (EUVD) identifier?: Yes. CVE-2024-42487 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2632.
When was CVE-2024-42487 published?: CVE-2024-42487 was published on 2024-08-15 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*
cpe:2.3:a:cilium:cilium:1.16.0:*:*:*:*:*:*:*

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