hyper is an HTTP library for rust. hyper's HTTP/1 server code had a flaw that incorrectly parses and accepts requests with a `Content-Length` header with a prefixed plus sign, when it should have been rejected as illegal. This combined with…
Exact source revision recorded 1 Nov 2026 19:06:53 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2021-1461
Publishedhyper is an HTTP library for rust. hyper's HTTP/1 server code had a flaw that incorrectly parses and accepts requests with a `Content-Length` header with a prefixed plus sign, when it should have been rejected as illegal. This combined with an upstream HTTP proxy that doesn't parse such `Content-Length` headers, but forwards them, can result in "request smuggling" or "desync attacks". The flaw exists in all prior versions of hyper prior to 0.14.10, if built with `rustc` v1.5.0 or newer. The vulnerability is patched in hyper version 0.14.10. Two workarounds exist: One may reject requests manually that contain a plus sign prefix in the `Content-Length` header or ensure any upstream proxy handles `Content-Length` headers with a plus sign prefix.
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: Jul 7, 2021, 8:05:11 PM
dateUpdated: Aug 3, 2024, 11:25:31 PM
2 related source bulletins · separate from aliases
openSUSE-SU-2024:11751-1: afterburn-5.0.0-6.1 on GA media
CVE-2020-35905 · CVE-2020-36465 · CVE-2021-27378 · CVE-2021-32714 · CVE-2021-32715 · CVE-2021-38191 · CVE-2021-45710
msrc_CVE-2021-32715: Lenient Parsing of Content-Length Header When Prefixed with Plus Sign
CVE-2021-32715
- Source published
- Jul 7, 2021, 8:05:11 PM (timezone not stated)
- Source modified
- Aug 3, 2024, 11:25:31 PM (timezone not stated)
- Observed here
- 1 Nov 2026 19:06:53 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.
EUVD CVSS 3.1 · 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N