High severity · published May 4, 2026
CVE-2026-7736
osrg GoBGP mrt.go parseRibEntry integer underflow
7.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
GoBGP · osrg
4.0; 4.1; 4.2; 4.3.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-7736
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-7736
Product
https://github.com/osrg/gobgp/
Patch
https://github.com/osrg/gobgp/commit/76d911046344a3923cbe573364197aa081944592
Patch
https://github.com/osrg/gobgp/releases/tag/v4.4.0
Third Party Advisory
https://vuldb.com/submit/807604
Third Party Advisory
https://vuldb.com/vuln/360911
Permissions Required
https://vuldb.com/vuln/360911/cti
More from GoBGP
9.8
CVE-2025-43973
An issue was discovered in GoBGP before 3.35.0
7.5
CVE-2026-41643
GoBGP: Remote Denial of Service (Panic) in UpdatePathAttrs4ByteAs via Malformed BGP UPDATE
7.5
CVE-2026-42285
GoBGP: Panic in AdjRib.Update via malformed BGP Update message (Nil Pointer Dereference)
7.5
CVE-2026-41642
GoBGP: Remote Denial of Service (Panic) via Malformed Well-known Path Attribute
7.5
CVE-2026-7737
osrg GoBGP BMP Parser bmp.go BMPStatisticsReport.ParseBody out-of-bounds