What’s Vulnerable › Vulnerabilities

CVE-2026-7736: osrg GoBGP mrt.go parseRibEntry integer underflow

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-04 · updated 2026-10-26
• Weakness: CWE-189

Description

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.

Affected products

• osrg GoBGP: before 4.4.0 — fixed in 4.4.0

How to fix

Upgrade to a fixed version: osrg GoBGP 4.4.0. Check the vendor advisory for mitigations.

References

• https://github.com/osrg/gobgp/
• https://github.com/osrg/gobgp/commit/76d911046344a3923cbe573364197aa081944592
• https://github.com/osrg/gobgp/releases/tag/v4.4.0
• https://vuldb.com/submit/807604
• https://vuldb.com/vuln/360911
• https://vuldb.com/vuln/360911/cti

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