gobgp: GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language
CVE-2026-49838 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-49838, released July 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.
GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.7.0, GoBGP accepts a zero-length AS_PATH during UPDATE decoding and later panics while validating that attribute for a confederation eBGP peer. The vulnerable path is in the BGP UPDATE validator: a malformed UPDATE that should be rejected as a malformed AS_PATH instead reaches an unchecked `p.Value[0]` access, allowing a configured confederation eBGP peer to trigger a denial of service. Version 4.7.0 patches the issue.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| gobgp · Debian 14 | 4.7.0-1 | DEBIAN-CVE-2026-49838 | Jul 14, 2026 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260727T201416-160000.1.1 | OPENSUSE-SU-2026:21551-1 | Aug 10, 2026 |
| govulncheck-vulndb · sles 16.0 | 0.0.20260727T201416-160000.1.1 | SUSE-SU-2026:23227-1 | Aug 10, 2026 |
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