Which versions of monolog/monolog are affected by GHSA-F57V-Q966-7FH6?

monolog/monolog (composer) versions >= 1.8.0, < 1.12.0 is affected.

Is there a fix for GHSA-F57V-Q966-7FH6?

Yes. GHSA-F57V-Q966-7FH6 is fixed in 1.12.0. Upgrade to this version or later.

Is GHSA-F57V-Q966-7FH6 exploitable, and should I be worried?

Whether GHSA-F57V-Q966-7FH6 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether GHSA-F57V-Q966-7FH6 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

GHSA-F57V-Q966-7FH6 in monolog/monolog

Q: What is GHSA-F57V-Q966-7FH6?

GHSA-F57V-Q966-7FH6 is a low-severity security vulnerability in monolog/monolog (composer), affecting versions >= 1.8.0, < 1.12.0. It is fixed in 1.12.0.

Q: Is there a fix for GHSA-F57V-Q966-7FH6?

Yes. GHSA-F57V-Q966-7FH6 is fixed in 1.12.0. Upgrade to this version or later.

Q: Is GHSA-F57V-Q966-7FH6 exploitable, and should I be worried?

Whether GHSA-F57V-Q966-7FH6 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether GHSA-F57V-Q966-7FH6 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix GHSA-F57V-Q966-7FH6?

Upgrade monolog/monolog to 1.12.0 or later.

GHSA-F57V-Q966-7FH6

GHSA-F57V-Q966-7FH6 is a low-severity security vulnerability in monolog/monolog (composer), affecting versions >= 1.8.0, < 1.12.0. It is fixed in 1.12.0.

Does this CVE actually affect you?

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Runtime intelligence, not another scanner.

Summary

Monolog Header injection in NativeMailerHandler

A header injection vulnerability has been identified in the NativeMailerHandler of the Monolog library. This vulnerability may allow an attacker to manipulate email headers when log messages are sent via email.

Impact

Affected versions

monolog/monolog (>= 1.8.0, < 1.12.0)

Security releases

monolog/monolog → 1.12.0 (composer)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

Upgrade monolog/monolog to 1.12.0 or later to resolve this vulnerability.

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is GHSA-F57V-Q966-7FH6? GHSA-F57V-Q966-7FH6 is a low-severity security vulnerability in monolog/monolog (composer), affecting versions >= 1.8.0, < 1.12.0. It is fixed in 1.12.0.
Which versions of monolog/monolog are affected by GHSA-F57V-Q966-7FH6? monolog/monolog (composer) versions >= 1.8.0, < 1.12.0 is affected.
Is there a fix for GHSA-F57V-Q966-7FH6? Yes. GHSA-F57V-Q966-7FH6 is fixed in 1.12.0. Upgrade to this version or later.
Is GHSA-F57V-Q966-7FH6 exploitable, and should I be worried? Whether GHSA-F57V-Q966-7FH6 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether GHSA-F57V-Q966-7FH6 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix GHSA-F57V-Q966-7FH6? Upgrade monolog/monolog to 1.12.0 or later.