CVE-2019-11923

Name: CVE-2019-11923
Creator: NVD / NIST
Published: 2019-12-04T16:15:11.637+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.45%

Last modified Jun 17, 2026

CVE-2019-11923 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In Mcrouter prior to v0.41.0, the deprecated ASCII parser would allocate a buffer to a user-specified length with no maximum length enforced, allowing for resource exhaustion or denial of service.. EPSS estimates a 1.45% chance of exploitation in the next 30 days.

Description

In Mcrouter prior to v0.41.0, the deprecated ASCII parser would allocate a buffer to a user-specified length with no maximum length enforced, allowing for resource exhaustion or denial of service.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.45%

70.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Facebook	Mcrouter	< 0.41.0

References

https://github.com/facebook/mcrouter/commit/98ce6624cd2563cfdb5da3b2949d5e1e03867034Patch, Third Party Advisory
https://github.com/facebook/mcrouter/releases/tag/v0.41.0-releaseRelease Notes, Vendor Advisory
https://www.facebook.com/security/advisories/cve-2019-11923Vendor Advisory
https://github.com/facebook/mcrouter/commit/98ce6624cd2563cfdb5da3b2949d5e1e03867034Patch, Third Party Advisory
https://github.com/facebook/mcrouter/releases/tag/v0.41.0-releaseRelease Notes, Vendor Advisory
https://www.facebook.com/security/advisories/cve-2019-11923Vendor Advisory

Timeline

Published: Dec 4, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-11923?

In Mcrouter prior to v0.41.0, the deprecated ASCII parser would allocate a buffer to a user-specified length with no maximum length enforced, allowing for resource exhaustion or denial of service.

How severe is CVE-2019-11923?

CVE-2019-11923 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.

How do I fix CVE-2019-11923?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-11923?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST