What’s Vulnerable › Vulnerabilities

CVE-2021-36155

• 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-770

Description

LengthPrefixedMessageReader in gRPC Swift 1.1.0 and earlier allocates buffers of arbitrary length, which allows remote attackers to cause uncontrolled resource consumption and deny service.

Affected products

• grpc-swift: 1.0.0, 1.1.0, 1.1.1

References

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35303
• https://github.com/grpc/grpc-swift/releases
• https://github.com/grpc/grpc-swift/security/advisories/GHSA-rxmj-hg9v-vp3p
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35303
• https://github.com/grpc/grpc-swift/releases
• https://github.com/grpc/grpc-swift/security/advisories/GHSA-rxmj-hg9v-vp3p

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