What’s Vulnerable › Vulnerabilities

CVE-2019-11923

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-12-04 · updated 2026-06-17
• Weakness: CWE-770

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.

Affected products

• Facebook Mcrouter: before 0.41.0 — fixed in 0.41.0

How to fix

Upgrade to a fixed version: Facebook Mcrouter 0.41.0. Check the vendor advisory for mitigations.

References

• https://github.com/facebook/mcrouter/commit/98ce6624cd2563cfdb5da3b2949d5e1e03867034
• https://github.com/facebook/mcrouter/releases/tag/v0.41.0-release
• https://www.facebook.com/security/advisories/cve-2019-11923
• https://github.com/facebook/mcrouter/commit/98ce6624cd2563cfdb5da3b2949d5e1e03867034
• https://github.com/facebook/mcrouter/releases/tag/v0.41.0-release
• https://www.facebook.com/security/advisories/cve-2019-11923

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