How severe is CVE-2026-30405?

CVE-2026-30405 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 none, integrity none, and availability high.

Is CVE-2026-30405 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-30405?

CVE-2026-30405 affects Osrg Gobgp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-30405?

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-2026-30405 have an EU (EUVD) identifier?

Yes. CVE-2026-30405 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12466.

When was CVE-2026-30405 published?

CVE-2026-30405 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-30405

CVE-2026-30405 is a high-severity vulnerability in Osrg Gobgp 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12466
Weakness: CWE-400
Affected product: Osrg Gobgp
Published: 2026-03-16
Last modified: 2026-06-17

Description

An issue in GoBGP gobgpd v.4.2.0 allows a remote attacker to cause a denial of service via the NEXT_HOP path attribute

Frequently asked questions

What is CVE-2026-30405?: An issue in GoBGP gobgpd v.4.2.0 allows a remote attacker to cause a denial of service via the NEXT_HOP path attribute
How severe is CVE-2026-30405?: CVE-2026-30405 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 none, integrity none, and availability high.
Is CVE-2026-30405 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-30405?: CVE-2026-30405 affects Osrg Gobgp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-30405?: 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-2026-30405 have an EU (EUVD) identifier?: Yes. CVE-2026-30405 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12466.
When was CVE-2026-30405 published?: CVE-2026-30405 was published on 2026-03-16 and last updated on 2026-06-17.

References

https://github.com/osrg/gobgp/issues/3305

Affected products (1)

cpe:2.3:a:osrg:gobgp:4.2.0:*:*:*:*:*:*:*

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