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TI-2021-14573 Aliases CVE-2021-36154GHSA-4rhq-vq24-88gw

HTTP2ToRawGRPCServerCodec in gRPC Swift 1.1.1 and earlier allows remote attackers to deny…

Priority LOW 37CWE-674Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-674.

Summary

HTTP2ToRawGRPCServerCodec in gRPC Swift 1.1.1 and earlier allows remote attackers to deny service via the delivery of many small messages within a single HTTP/2 frame, leading to Uncontrolled Recursion and stack consumption.

Why it matters now

EPSS 0.02082 81st percentileScored 2026-11-07
Fix Fixed github.com/grpc/grpc-swift (SwiftURL): 1.2.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—github.com/grpc/grpc-swift (SwiftURL)before 1.2.01.2.0Patch availableGHSA-4rhq-vq24-88gw
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • github.com/grpc/grpc-swift (SwiftURL) Vendor— Affected before 1.2.0 Fixed in 1.2.0 Patch available GHSA-4rhq-vq24-88gw

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:grpc_swift:1.0.0:*:*:*:*:*:*:*1.0.0Vulnerablebackstage
cpe:2.3:a:linuxfoundation:grpc_swift:1.1.0:*:*:*:*:*:*:*1.1.0Vulnerablebackstage
cpe:2.3:a:linuxfoundation:grpc_swift:1.1.1:*:*:*:*:*:*:*1.1.1Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:grpc_swift:1.0.0:*:*:*:*:*:*:* Versions 1.0.0 Vulnerable ·backstage
  • cpe:2.3:a:linuxfoundation:grpc_swift:1.1.0:*:*:*:*:*:*:* Versions 1.1.0 Vulnerable ·backstage
  • cpe:2.3:a:linuxfoundation:grpc_swift:1.1.1:*:*:*:*:*:*:* Versions 1.1.1 Vulnerable ·backstage

Remediation

  • Fix · GHSA-4rhq-vq24-88gw github.com/grpc/grpc-swift (SwiftURL) Fixed in 1.2.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-36154
  2. 2026-10-03 Alias added: GHSA-4rhq-vq24-88gw

References

Advisory 4

Other 2

  • TI-2022-08591 Denial of Service via reachable assertion in grpc-swift CVSS 3.1HIGH 7.5
  • TI-2021-14574 LengthPrefixedMessageReader in gRPC Swift 1.1.0 and earlier allocates buffers of… CVSS 3.1HIGH 7.5
  • TI-2021-14572 Mismanaged state in GRPCWebToHTTP2ServerCodec.swift in gRPC Swift 1.1.0 and 1.1.1 allows… CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences