# hyper (crates.io) vulnerabilities Source: https://junglewise.ai/threats/technologies/hyper Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/hyper.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 8 vulnerabilities in hyper (crates.io): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, Parser creates invalid uninitialized value, was published on 16 June 2022. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 0 - All time: 8 (0 critical, 0 exploited in the wild) ## About hyper (crates.io) Rust HTTP client and server library providing low-level network protocol handling. ## Latest hyper (crates.io) vulnerabilities - [Parser creates invalid uninitialized value](https://junglewise.ai/threats/parser-creates-invalid-uninitialized-value-fc2e82a9) (info, published 16 Jun 2022) - [RUSTSEC-2022-0022 - Parser creates invalid uninitialized value](https://junglewise.ai/threats/rustsec-2022-0022-parser-creates-invalid-uninitialized-value-4d855480) (info, published 10 May 2022) - [CVE-2021-32715: RUSTSEC-2021-0078 - Lenient `hyper` header parsing of `Content-Length` could allow request smuggling](https://junglewise.ai/threats/cve-2021-32715-lenient-parsing-of-content-length-header-when-prefixed-with-plus) (low, CVSS 3.1, published 7 Jul 2021) - [CVE-2021-32714: RUSTSEC-2021-0079 - Integer overflow in `hyper`'s parsing of the `Transfer-Encoding` header leads to data loss](https://junglewise.ai/threats/cve-2021-32714-integer-overflow-in-chunked-transfer-encoding) (low, CVSS 3.1, published 7 Jul 2021) - [CVE-2021-21299: RUSTSEC-2021-0020 - Multiple Transfer-Encoding headers misinterprets request payload](https://junglewise.ai/threats/cve-2021-21299-http-request-smuggling-in-hyper) (low, CVSS 3.1, published 5 Feb 2021) - [CVE-2020-35863: RUSTSEC-2020-0008 - Flaw in hyper allows request smuggling by sending a body in GET requests](https://junglewise.ai/threats/cve-2020-35863-http-request-smuggling-in-hyper) (low, CVSS 3.1, published 19 Mar 2020) - [CVE-2017-18587: RUSTSEC-2017-0002 - headers containing newline characters can split messages](https://junglewise.ai/threats/cve-2017-18587-headers-containing-newline-characters-can-split-messages-in-hyper) (low, CVSS 3, published 23 Jan 2017) - [CVE-2016-10932: RUSTSEC-2016-0002 - HTTPS MitM vulnerability due to lack of hostname verification](https://junglewise.ai/threats/cve-2016-10932-https-mitm-vulnerability-due-to-lack-of-hostname-verification) (low, CVSS 3, published 9 May 2016) ## Most severe hyper (crates.io) vulnerabilities - [CVE-2021-21299: RUSTSEC-2021-0020 - Multiple Transfer-Encoding headers misinterprets request payload](https://junglewise.ai/threats/cve-2021-21299-http-request-smuggling-in-hyper) (low, CVSS 3.1, published 5 Feb 2021) - [CVE-2020-35863: RUSTSEC-2020-0008 - Flaw in hyper allows request smuggling by sending a body in GET requests](https://junglewise.ai/threats/cve-2020-35863-http-request-smuggling-in-hyper) (low, CVSS 3.1, published 19 Mar 2020) - [CVE-2021-32714: RUSTSEC-2021-0079 - Integer overflow in `hyper`'s parsing of the `Transfer-Encoding` header leads to data loss](https://junglewise.ai/threats/cve-2021-32714-integer-overflow-in-chunked-transfer-encoding) (low, CVSS 3.1, published 7 Jul 2021) - [CVE-2021-32715: RUSTSEC-2021-0078 - Lenient `hyper` header parsing of `Content-Length` could allow request smuggling](https://junglewise.ai/threats/cve-2021-32715-lenient-parsing-of-content-length-header-when-prefixed-with-plus) (low, CVSS 3.1, published 7 Jul 2021) - [CVE-2017-18587: RUSTSEC-2017-0002 - headers containing newline characters can split messages](https://junglewise.ai/threats/cve-2017-18587-headers-containing-newline-characters-can-split-messages-in-hyper) (low, CVSS 3, published 23 Jan 2017) - [CVE-2016-10932: RUSTSEC-2016-0002 - HTTPS MitM vulnerability due to lack of hostname verification](https://junglewise.ai/threats/cve-2016-10932-https-mitm-vulnerability-due-to-lack-of-hostname-verification) (low, CVSS 3, published 9 May 2016) - [Parser creates invalid uninitialized value](https://junglewise.ai/threats/parser-creates-invalid-uninitialized-value-fc2e82a9) (info, published 16 Jun 2022) - [RUSTSEC-2022-0022 - Parser creates invalid uninitialized value](https://junglewise.ai/threats/rustsec-2022-0022-parser-creates-invalid-uninitialized-value-4d855480) (info, published 10 May 2022) ## Vulnerabilities per week Nothing was published in the last eight weeks. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other crates.io technologies - [surrealdb (crates.io)](https://junglewise.ai/threats/technologies/surrealdb): 83 vulnerabilities - [wasmtime (crates.io)](https://junglewise.ai/threats/technologies/wasmtime): 67 vulnerabilities - [deno (crates.io)](https://junglewise.ai/threats/technologies/deno): 39 vulnerabilities - [zebrad (crates.io)](https://junglewise.ai/threats/technologies/zebrad): 27 vulnerabilities - [russh (crates.io)](https://junglewise.ai/threats/technologies/crates-io-russh): 26 vulnerabilities - [openssl-src (crates.io)](https://junglewise.ai/threats/technologies/openssl-src): 26 vulnerabilities - [openssl (crates.io)](https://junglewise.ai/threats/technologies/crates-io-openssl): 25 vulnerabilities - [rustfs (crates.io)](https://junglewise.ai/threats/technologies/rustfs): 25 vulnerabilities - [coreutils (crates.io)](https://junglewise.ai/threats/technologies/crates-io-coreutils): 21 vulnerabilities - [ckb (crates.io)](https://junglewise.ai/threats/technologies/ckb): 19 vulnerabilities - [apollo-router (crates.io)](https://junglewise.ai/threats/technologies/apollo-router): 13 vulnerabilities - [deepseek-tui (crates.io)](https://junglewise.ai/threats/technologies/deepseek-tui): 13 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "hyper (crates.io) vulnerabilities", https://junglewise.ai/threats/technologies/hyper, 9 November 2026.