CVE-2026-41507: math-codegen generates code from mathematical expressions

Q: How do I fix CVE-2026-41507?

math-codegen: upgrade to 0.4.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-41507 being exploited?

CVE-2026-41507 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-41507 affect?

CVE-2026-41507 affects math-codegen. Severity is critical (CVSS 9.8). math-codegen generates code from mathematical expressions. Prior to version 0.4.3, string literal content passed to cg.parse() is injected verbatim into a new Function() body without sanitization. This allows an attacker to execute arbitrar

Q: How urgent is CVE-2026-41507?

Priority 48/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-41507 is a critical-severity flaw (CVSS 9.8) affecting math-codegen. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

math-codegen generates code from mathematical expressions. Prior to version 0.4.3, string literal content passed to cg.parse() is injected verbatim into a new Function() body without sanitization. This allows an attacker to execute arbitrary system commands when user-controlled input reaches the parser. Any application exposing a math evaluation endpoint where user input flows into cg.parse() is vulnerable to full RCE. This issue has been patched

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-05-08
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: mauriciopoppe

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-08 14:16 UTCPublished CVE record published
2026-10-26 19:10 UTCUpdated Record last modified

mauriciopoppe math-codegen UPGRADE

Affected: < 0.4.3

Fixed in: 0.4.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy math-codegen || rpm -q math-codegen || math-codegen --version

2. UPGRADE to 0.4.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade math-codegen

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade math-codegen

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41507?

math-codegen: upgrade to 0.4.3. Exact commands for each OS are on this page.

Is CVE-2026-41507 being exploited?

CVE-2026-41507 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41507 affect?

CVE-2026-41507 affects math-codegen. Severity is critical (CVSS 9.8). math-codegen generates code from mathematical expressions. Prior to version 0.4.3, string literal content passed to cg.parse() is injected verbatim into a new Function() body without sanitization. This allows an attacker to execute arbitrar

How urgent is CVE-2026-41507?

Priority 48/100. Critical severity; Remotely exploitable, no login, no user action

References

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