hyper is an HTTP library for Rust. In versions prior to 0.14.10, hyper's HTTP server and client code had a flaw that could trigger an integer overflow when decoding chunk sizes that are too big. This allows possible data loss, or if combine…
Exact source revision recorded 28 Oct 2026 15:51:32 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2021-1440
Publishedhyper is an HTTP library for Rust. In versions prior to 0.14.10, hyper's HTTP server and client code had a flaw that could trigger an integer overflow when decoding chunk sizes that are too big. This allows possible data loss, or if combined with an upstream HTTP proxy that allows chunk sizes larger than hyper does, can result in "request smuggling" or "desync attacks." The vulnerability is patched in version 0.14.10. Two possible workarounds exist. One may reject requests manually that contain a `Transfer-Encoding` header or ensure any upstream proxy rejects `Transfer-Encoding` chunk sizes greater than what fits in 64-bit unsigned integers.
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, 7:35:10 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-2021-32714: Integer Overflow in Chunked Transfer-Encoding
CVE-2021-32714
- Source published
- Jul 7, 2021, 7:35:10 PM (timezone not stated)
- Source modified
- Aug 3, 2024, 11:25:31 PM (timezone not stated)
- Observed here
- 28 Oct 2026 15:51:32 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 · 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H