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CVE-2019-16140

30
FAUCET Score

CVE-2019-16140 describes a critical use-after-free vulnerability in the chttp crate prior to version 0.1.3, specifically impacting the isahc_project isahc library in Rust. This flaw, rated with a CVSS score of 9.8, allows for remote, unauthenticated attackers to achieve high impact on confidentiality, integrity, and availability with low attack complexity. Despite its critical severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
0.1.2CPE matchmatch criteria
cpe:2.3:a:isahc_project:isahc:0.1.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.63%
Probability of exploitation in next 30 days
EPSS Percentile
73.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0163 is in the 61st percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

rustpatch availablevia ghsa
Product: chttpFixed in: 0.1.3

Vendor Advisories (1)

rustGHSA-5rrv-m36h-qwf8critical

Use-after-free in chttp

Aug 25, 2021

References

github.com / sagebind/isahc/issues/2
rustsec.org / advisories/RUSTSEC-2019-0016.html
Third Party Advisory