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CVE-2018-6347

24
FAUCET Score

CVE-2018-6347 describes a denial-of-service vulnerability in Proxygen, specifically affecting versions prior to v2018.12.31.00, due to improper handling of HTTP/2 headers and trailers. This high-severity vulnerability (CVSS 7.5) can be exploited remotely with low attack complexity, leading to a complete loss of availability for affected systems. There is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2018.12.31.00CPE matchmatch criteria
cpe:2.3:a:proxygen_project:proxygen:*:*:*:*:*:*:*:*
<= v2018.12.31.00CPE match
cpe:2.3:a:facebook:proxygen:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.37%
Probability of exploitation in next 30 days
EPSS Percentile
69.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0137 is in the 50th percentile among its peer group of 51,485 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / facebook/proxygen/commit/223e0aa6bc7590e86af1e917185a2e0efe160711
PatchThird Party Advisory