# CVE-2026-7735: osrg GoBGP AIGP Attribute bgp.go PathAttributeAigp.DecodeFromBytes buffer overflow

> A buffer overflow in the GoBGP library's AIGP attribute parser allows remote attackers to execute arbitrary code or cause a denial of service.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 4 May 2026
- **Updated:** 4 May 2026
- **Also known as:** DEBIAN-CVE-2026-7735, GHSA-5jvq-55xj-6qff, UBUNTU-CVE-2026-7735

## What is CVE-2026-7735?

CVE-2026-7735 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 found in osrg GoBGP up to 4.3.0. Affected is the function PathAttributeAigp.DecodeFromBytes of the file pkg/packet/bgp/bgp.go of the component AIGP Attribute Parser. Performing a manipulation results in buffer overflow. It is possible to initiate the attack remotely. Upgrading to version 4.4.0 is able to address this issue. The patch is named 51ad1ada06cb41ce47b7066799981816f50b7ced. The affected component should be upgraded.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-7735?

It affects 1 product.


Products: Osrg Gobgp.

## How do I fix CVE-2026-7735?

Upgrade to a fixed version.

## Is CVE-2026-7735 being exploited?

There is no known exploitation of CVE-2026-7735 in the wild and no public exploit code.

## Other vulnerabilities in osrg GoBGP

- [CVE-2025-43971](https://insights.sbomify.com/CVE-2025-43971/): GoBGP panics due to a zero value for softwareVersionLen (high 8.6)
- [CVE-2026-41642](https://insights.sbomify.com/CVE-2026-41642/): GoBGP: Remote Denial of Service (Panic) via Malformed Well-known Path Attribute (high 7.5)
- [CVE-2026-41643](https://insights.sbomify.com/CVE-2026-41643/): GoBGP: Remote Denial of Service (Panic) in UpdatePathAttrs4ByteAs via Malformed BGP UPDATE (high 7.5)
- [CVE-2026-42285](https://insights.sbomify.com/CVE-2026-42285/): GoBGP: Panic in AdjRib.Update via malformed BGP Update message (Nil Pointer Dereference) (high 7.5)
- [CVE-2026-37461](https://insights.sbomify.com/CVE-2026-37461/): GoBGP has an out-of-bounds read in the ParseIP6Extended function (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-7735 and fix it if it is affected.

What it is: CVE-2026-7735 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.
Exploitation: There is no known exploitation of CVE-2026-7735 in the wild and no public exploit code.

Affected product: osrg GoBGP. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-7735/ (Markdown: https://insights.sbomify.com/CVE-2026-7735/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-7735
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7735
- OSV: https://osv.dev/vulnerability/CVE-2026-7735

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-7735/
Summaries are generated and may contain mistakes; the official description above is the record.