How severe is CVE-2026-5122?

CVE-2026-5122 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-5122 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5122?

CVE-2026-5122 affects Osrg Gobgp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5122?

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

Does CVE-2026-5122 have an EU (EUVD) identifier?

Yes. CVE-2026-5122 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17091.

When was CVE-2026-5122 published?

CVE-2026-5122 was published on 2026-03-30 and last updated on 2026-06-17.

CVE-2026-5122

CVE-2026-5122 is a low-severity vulnerability in Osrg Gobgp with a CVSS 3.x base score of 3.7. 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-266.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
CVSS v2: 2.6
CVSS v4: 6.3
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17091
Weakness: CWE-266
Affected product: Osrg Gobgp
Published: 2026-03-30
Last modified: 2026-06-17

Description

A security flaw has been discovered in osrg GoBGP up to 4.3.0. This affects the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go of the component BGP OPEN Message Handler. Performing a manipulation of the argument domainNameLen results in improper access controls. The attack may be initiated remotely. A high degree of complexity is needed for the attack. The exploitability is reported as difficult. The patch is named 2b09db390a3d455808363c53e409afe6b1b86d2d. It is suggested to install a patch to address this issue.

Frequently asked questions

What is CVE-2026-5122?: A security flaw has been discovered in osrg GoBGP up to 4.3.0. This affects the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go of the component BGP OPEN Message Handler. Performing a manipulation of the argument domainNameLen results in improper access controls. The attack may be initiated remotely. A high degree of complexity is needed for the attack. The exploitability is reported as difficult. The patch is named 2b09db390a3d455808363c53e409afe6b1b86d2d. It is suggested to install a patch to address this issue.
How severe is CVE-2026-5122?: CVE-2026-5122 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-5122 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5122?: CVE-2026-5122 affects Osrg Gobgp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5122?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5122 have an EU (EUVD) identifier?: Yes. CVE-2026-5122 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17091.
When was CVE-2026-5122 published?: CVE-2026-5122 was published on 2026-03-30 and last updated on 2026-06-17.

References

Affected products (1)

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

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