9.8

CVE-2020-35863: hyper HTTP Request/Response Smuggling

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2020-35863DEBIAN-CVE-2020-35863GHSA-h3qr-rq2j-74w4
Published 31-12-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-35863 is a critical (CVSS 9.8) HTTP Request/Response Smuggling vulnerability in hyper. EPSS estimates a 2.97% chance of exploitation in the next 30 days, higher than 87% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
2.97%
0%100%
Low · +0.18 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 31-12-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in the hyper crate before 0.12.34 for Rust. HTTP request smuggling can occur. Remote code execution can occur in certain situations with an HTTP server on the loopback interface.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

2.97%

Chance of exploitation in the next 30 days

Percentile

87%

Versus all other CVEs

30-day change

+0.18 pp

From 2.80% on 20-09-2026

20-09-202620-10-2026
EPSS score
2.97%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Crates.Io1 product
  • hyper≥ 0.11.0, < 0.12.34
Debian1 product
  • rust-hyper< 0.12.35-1
Hyper1 product
Ubuntu1 product
  • rust-hyper< 0.12.35-1

4 vendors · 4 products

References

8 links