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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-23759

24
FAUCET Score

CVE-2023-23759 is a denial-of-service vulnerability affecting the Facebook fizz library prior to version v2023.01.30.00. An unauthenticated attacker can remotely crash the process by manipulating cipher advertisements between ClientHello messages, resulting in a CVSS score of 7.5 (High) due to its network attack vector and low attack complexity. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 2023.01.30.00CPE matchmatch criteria
cpe:2.3:a:facebook:fizz:*:*:*:*:*:*:*:*
>= v0.0.0.0, < v2023.01.30.00CPE match
cpe:2.3:a:facebook:fizz:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
0.72%
Probability of exploitation in next 30 days
EPSS Percentile
50.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0072 is in the 26th percentile among its peer group of 51,551 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 / facebookincubator/fizz/commit/8d3649841597bedfb6986c30431ebad0eb215265
Patch
facebook.com / security/advisories/cve-2023-23759
PatchVendor Advisory