PT-2026-49152 · Gobgp · Gobgp
CVE-2026-49837
·
Published
2026-06-04
·
Updated
2026-07-24
CVSS v3.1
5.9
Medium
| Vector | AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
Name of the Vulnerable Software and Affected Versions
GoBGP (affected versions not specified)
Description
GoBGP contains a BGP OPEN capability parsing issue where several concrete capability decoders parse data from the full remaining capability buffer instead of the slice bounded by the declared capability length
CapLen. A malformed BGP OPEN message can cause bytes from a subsequent capability to be interpreted as part of the current capability. This is particularly critical in the 4-octet AS capability, where a CapLen of 0 may lead the parser to read bytes from the following capability as the 4-octet AS value, potentially affecting peer AS validation during BGP session establishment. The issue resides in the BGP OPEN capability parser within pkg/packet/bgp/bgp.go and pkg/packet/bgp/validate.go. This boundary validation issue can impact capability negotiation and the acceptance or rejection decisions during session establishment.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Gobgp