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CVE-2026-41643

GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP where a malformed BGP UPDATE message can trigger a runtime error: index out of range panic. This occurs during the processing of 4-byte AS attributes when the message structure causes an internal slice index shift that is not properly handled. This issue has been patched in version 4.3.0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7c5f8e4f5b95a56c35a7ade36daea99dae0561801e3cc7f6a009a21a6030adac
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"gobgp","vendor":"osrg","versions":[{"status":"affected","version":"< 4.3.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2b635531b3f1f3327f4664a718653ce9f1ec0803cb15272ac820333deec14115 · sha256:1bc5f30c7bfc4d69… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2b635531b3f1f3327f4664a718653ce9f1ec0803cb15272ac820333deec14115 · sha256:1bc5f30c7bfc4d69… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-129","description":"CWE-129: Improper Validation of Array Index","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2b635531b3f1f3327f4664a718653ce9f1ec0803cb15272ac820333deec14115 · sha256:1bc5f30c7bfc4d69… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/osrg/gobgp/releases/tag/v4.3.0","tags":["x_refsource_MISC"],"url":"https://github.com/osrg/gobgp/releases/tag/v4.3.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2b635531b3f1f3327f4664a718653ce9f1ec0803cb15272ac820333deec14115 · sha256:1bc5f30c7bfc4d69… · /containers/cna/references/1
{"name":"https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2b635531b3f1f3327f4664a718653ce9f1ec0803cb15272ac820333deec14115 · sha256:1bc5f30c7bfc4d69… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2b635531b3f1f3327f4664a718653ce9f1ec0803cb15272ac820333deec14115 · sha256:1bc5f30c7bfc4d69… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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