CVE-2021-36155 json
Uncontrolled Resource Consumption in LengthPrefixedMessageReader
published 2021-07-09 5 y ago modified 2026-07-08 4 mo ago also EUVD-2023-1886 , GHSA-rxmj-hg9v-vp3p
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.1%
- EPSS 2.1% chance of exploitation in 30 days, percentile 81%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Exploit prediction
2.08% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| swift | github.com/grpc/grpc-swift | <1.2.0 |
1.2.0 |
Classification
References
-
github.com
/grpc/grpc-swift/releases
release-notes, third-party-advisory
-
bugs.chromium.org
/p/oss-fuzz/issues/detail?id=35303
web, mailing-list, third-party-advisory
-
github.com
/grpc/grpc-swift/security/advisories/GHSA-rxmj-hg9v-vp3p
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-36155
advisory
-
github.com
/grpc/grpc-swift
package
-
github.com
/grpc/grpc-swift/releases/tag/1.2.0
web
Sources
- CVE List CVE-2021-36155
- GitHub Advisory GHSA-rxmj-hg9v-vp3p
- NVD CVE-2021-36155
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