Skip to content
Fencer Vulns
high 7.5

CVE-2026-37461 json

GoBGP has an out-of-bounds read in the ParseIP6Extended function

published 2026-05-04 6 mo ago modified 2026-11-08 22 h ago also EUVD-2026-26999 , GHSA-wmvj-f67g-qg4g , GO-2026-5713

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

An out-of-bounds read in the ParseIP6Extended function (/bgp/bgp.go) of gobgp v4.3.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message.

Patch / fix

  • go github.com/osrg/gobgp/v4 4.4.0
  • gobgp Debian 14 4.4.0-1

debian advisories DEBIAN-CVE-2026-37461

  • gobgp Ubuntu Pro 18.04 LTS 1.29-1ubuntu0.1+esm2
  • gobgp Ubuntu Pro 20.04 LTS 2.12.0-1ubuntu0.1~esm3
  • gobgp Ubuntu Pro 22.04 LTS 2.25.0-3ubuntu0.1+esm4
  • gobgp Ubuntu Pro 24.04 LTS 3.23.0-1ubuntu0.3+esm4
  • gobgp Ubuntu Pro 26.04 LTS 3.36.0-2ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2026-37461

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-37461 updated cvss 7.5

github.com/osrg/gobgp: gobgp: Denial of Service via crafted BGP UPDATE message

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/osrg/gobgp/v4
<4.4.0
4.4.0

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.