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CVE-2019-11923

24
FAUCET Score

CVE-2019-11923 describes a resource exhaustion vulnerability in Facebook Mcrouter versions prior to v0.41.0, stemming from an unconstrained buffer allocation within its deprecated ASCII parser. This flaw carries a CVSS v3.1 score of 7.5 (HIGH), indicating it can be exploited remotely with low complexity to achieve a denial of service. While the vulnerability has a high severity rating, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.41.0CPE match
cpe:2.3:a:facebook:mcrouter:*:*:*:*:*:*:*:*

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
1.45%
Probability of exploitation in next 30 days
EPSS Percentile
70.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0145 is in the 52nd percentile among its peer group of 51,553 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/mcrouter/commit/98ce6624cd2563cfdb5da3b2949d5e1e03867034
PatchThird Party Advisory
github.com / facebook/mcrouter/releases/tag/v0.41.0-release
Release NotesVendor Advisory
facebook.com / security/advisories/cve-2019-11923
Vendor Advisory