CVE-2026-7737 osrg GoBGP BMP Parser bmp.go BMPStatisticsReport.ParseBody out-of-bounds
Remote attackers can trigger an out-of-bounds read in the GoBGP BMP parser, potentially causing denial of service or information disclosure.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-7737?
CVE-2026-7737 is a medium-severity memory corruption vulnerability in osrg GoBGP, published on 4 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was identified in osrg GoBGP up to 4.3.0. Affected by this issue is the function BMPPeerUpNotification.ParseBody/BMPStatisticsReport.ParseBody of the file pkg/packet/bmp/bmp.go of the component BMP Parser. The manipulation leads to out-of-bounds read. The attack can be initiated remotely. Upgrading to version 4.4.0 can resolve this issue. The identifier of the patch is bc77597d42335c78464bc8e15a471d887bbdf260. Upgrading the affected component is recommended.
Which versions are affected by CVE-2026-7737?
3 open source packages ship an affected version, including github.com/osrg/gobgp and github.com/osrg/gobgp/v4. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/osrg/gobgp Go | All versions | 4.4.0 |
github.com/osrg/gobgp Go | All versions | 4.4.0 |
github.com/osrg/gobgp/v4 Go | All versions | 4.4.0 |
Products include Osrg Gobgp.
How do I fix CVE-2026-7737?
Upgrade github.com/osrg/gobgp to 4.4.0 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-7737 being exploited?
There is no known exploitation of CVE-2026-7737 in the wild and no public exploit code.
Other vulnerabilities in osrg GoBGP
- CVE-2025-43971 GoBGP panics due to a zero value for softwareVersionLen
- CVE-2026-41642 GoBGP: Remote Denial of Service (Panic) via Malformed Well-known Path Attribute
- CVE-2026-41643 GoBGP: Remote Denial of Service (Panic) in UpdatePathAttrs4ByteAs via Malformed BGP UPDATE
- CVE-2026-42285 GoBGP: Panic in AdjRib.Update via malformed BGP Update message (Nil Pointer Dereference)
- CVE-2026-37461 GoBGP has an out-of-bounds read in the ParseIP6Extended function
Sources
Also known as DEBIAN-CVE-2026-7737, GHSA-w88c-9vg8-cmq8, GO-2026-5699, UBUNTU-CVE-2026-7737.