{"cve":"CVE-2023-32732","nvd":{"published":"2023-06-09T11:15:09.377","modified":"2026-06-17T05:59:28.440","status":"Modified","description":"gRPC contains a vulnerability whereby a client can cause a termination of connection between a HTTP2 proxy and a gRPC server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies. We recommend upgrading beyond the commit in  https://github.com/grpc/grpc/pull/32309 https://www.google.com/url","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3},"cwes":["CWE-440"],"references":["https://github.com/grpc/grpc/pull/32309","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/37IDNVY5AWVH7JDMM2SDTL24ZPPZJNSY/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VWE44J5FG7THHL7XVEVTNIGEYBNKJBLL/","https://github.com/grpc/grpc/pull/32309","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/37IDNVY5AWVH7JDMM2SDTL24ZPPZJNSY/"],"products":["fedoraproject:fedora","grpc:grpc"],"source":"nvd","synced_at":"2026-10-19T21:38:24.161619714+00:00"},"epss":{"cve":"CVE-2023-32732","score":0.00527,"percentile":0.44641,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9hxf-ppjv-w6rq","url":"https://osv.dev/vulnerability/GHSA-9hxf-ppjv-w6rq","summary":"gRPC connection termination issue","modified":"2026-09-10T03:49:57.444519346Z","packages":[{"ecosystem":"Maven","name":"io.grpc:grpc-protobuf","purl":"pkg:maven/io.grpc/grpc-protobuf","ranges":[">=1.53.0 <1.53.1"],"fixed":["1.53.1"]},{"ecosystem":"PyPI","name":"grpcio","purl":"pkg:pypi/grpcio","ranges":[">=1.53.0 <1.53.1"],"fixed":["1.53.1"]},{"ecosystem":"RubyGems","name":"grpc","purl":"pkg:gem/grpc","ranges":[">=1.53.0 <1.53.1"],"fixed":["1.53.1"]},{"ecosystem":"Maven","name":"io.grpc:grpc-protobuf","purl":"pkg:maven/io.grpc/grpc-protobuf","ranges":[">=1.54.0 <1.54.2"],"fixed":["1.54.2"]},{"ecosystem":"PyPI","name":"grpcio","purl":"pkg:pypi/grpcio","ranges":[">=1.54.0 <1.54.2"],"fixed":["1.54.2"]},{"ecosystem":"RubyGems","name":"grpc","purl":"pkg:gem/grpc","ranges":[">=1.54.0 <1.54.2"],"fixed":["1.54.2"]}]},{"id":"PYSEC-2026-1426","url":"https://osv.dev/vulnerability/PYSEC-2026-1426","summary":"gRPC connection termination issue","modified":"2026-07-07T17:47:41.848620701Z","packages":[{"ecosystem":"PyPI","name":"grpcio","purl":"pkg:pypi/grpcio","ranges":[">=1.53.0 <1.53.1",">=1.54.0 <1.54.2"],"fixed":["1.53.1","1.54.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}