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CVE-2017-18587

18
FAUCET Score

CVE-2017-18587 is a medium-severity vulnerability affecting the hyper crate for Rust, specifically versions prior to 0.9.18. It involves improper handling of newlines in HTTP headers, categorized as CWE-93. With a CVSS score of 5.3, this network-exploitable vulnerability has low attack complexity and could lead to integrity impacts, though confidentiality and availability are unaffected. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, suggesting it is not a widely targeted or discussed threat.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.9.18CPE matchmatch criteria
cpe:2.3:a:hyper:hyper:*:*:*:*:*:*:*:*
>= 0.10.0, < 0.10.2CPE matchmatch criteria
cpe:2.3:a:hyper:hyper:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.03%
Probability of exploitation in next 30 days
EPSS Percentile
60.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0103 is in the 38th percentile among its peer group of 23,684 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

rustpatch availablevia ghsa
Product: hyperFixed in: 0.10.2
rustpatch availablevia ghsa
Product: hyperFixed in: 0.9.18

Vendor Advisories (1)

rustGHSA-q89x-f52w-6hj2medium

Headers containing newline characters can split messages in hyper

Aug 25, 2021

References

rustsec.org / advisories/RUSTSEC-2017-0002.html
Third Party Advisory