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TI-2026-06818 Aliases CVE-2026-7736GHSA-hj4w-qr9j-c4cf

osrg GoBGP mrt.go parseRibEntry integer underflow

Priority LOW 37CWE-189Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

A vulnerability was determined in osrg GoBGP up to 4.3.0. Affected by this vulnerability is the function parseRibEntry of the file pkg/packet/mrt/mrt.go. Executing a manipulation can lead to integer underflow. It is possible to launch the attack remotely. Upgrading to version 4.4.0 addresses this issue. This patch is called 76d911046344a3923cbe573364197aa081944592. It is suggested to upgrade the affected component.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00454 39th percentileScored 2026-11-07
Fix Fixed GoBGP (osrg): 4.4.0github.com/osrg/gobgp/v4 (Go): 4.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
osrgGoBGP4.0; 4.1; 4.2; 4.3.04.4.0Patch availableCNA
—github.com/osrg/gobgp/v4 (Go)before 4.4.04.4.0Patch availableGHSA-hj4w-qr9j-c4cf
  • GoBGP Vendorosrg Affected 4.0; 4.1; 4.2; 4.3.0 Fixed in 4.4.0 Patch available CNA
  • github.com/osrg/gobgp/v4 (Go) Vendor— Affected before 4.4.0 Fixed in 4.4.0 Patch available GHSA-hj4w-qr9j-c4cf

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:osrg:gobgp:*:*:*:*:*:*:*:*before 4.4.0Vulnerableosrg
  • cpe:2.3:a:osrg:gobgp:*:*:*:*:*:*:*:* Versions before 4.4.0 Vulnerable ·osrg

Remediation

  • Fix · CNA GoBGP (osrg) Fixed in 4.4.0
  • Fix · GHSA-hj4w-qr9j-c4cf github.com/osrg/gobgp/v4 (Go) Fixed in 4.4.0 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-7736
  2. 2026-10-03 Alias added: GHSA-hj4w-qr9j-c4cf

References

Patch 2

Advisory 1

Other 2

  • TI-2026-30596 GoBGP: Panic in AdjRib.Update via malformed BGP Update message (Nil Pointer Dereference) CVSS 3.1HIGH 7.5
  • TI-2026-30162 GoBGP: Remote Denial of Service (Panic) in UpdatePathAttrs4ByteAs via Malformed BGP UPDATE CVSS 3.1HIGH 7.5
  • TI-2026-30161 GoBGP: Remote Denial of Service (Panic) via Malformed Well-known Path Attribute CVSS 3.1HIGH 7.5
  • TI-2026-23526 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 CVSS 3.1HIGH 7.5
  • TI-2025-28529 An issue was discovered in GoBGP before 3.35.0. CVSS 3.1HIGH 8.6
  • TI-2025-28531 An issue was discovered in GoBGP before 3.35.0. CVSS 3.1CRITICAL 9.8
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences