What’s Vulnerable › Vulnerabilities

CVE-2021-36154

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-09 · updated 2026-06-17
• Weakness: CWE-674

Description

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.

Affected products

• grpc-swift: 1.0.0, 1.1.0, 1.1.1

References

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35274
• https://github.com/grpc/grpc-swift/releases
• https://github.com/grpc/grpc-swift/security/advisories/GHSA-4rhq-vq24-88gw
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35274
• https://github.com/grpc/grpc-swift/releases
• https://github.com/grpc/grpc-swift/security/advisories/GHSA-4rhq-vq24-88gw

Get alerted when CVE-2021-36154 or the next vulnerability affects your stack