CVE-2023-26122: All versions of the package safe-eval are vulnerable to Sandbox Bypass due to improper input sanitization

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HIGH 8.8UPGRADE

CVE-2023-26122 is a high-severity flaw (CVSS 8.8) affecting safe-eval. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

All versions of the package safe-eval are vulnerable to Sandbox Bypass due to improper input sanitization. The vulnerability is derived from prototype pollution exploitation. Exploiting this vulnerability might result in remote code execution ("RCE"). **Vulnerable functions:** __defineGetter__, stack(), toLocaleString(), propertyIsEnumerable.call(), valueOf().

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-265, CWE-1321
Published	2023-04-11
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: safe-eval project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-04-11 05:15 UTCPublished CVE record published
2026-06-17 05:42 UTCUpdated Record last modified

safe-eval project safe-eval UPGRADE

Affected: <= 0.4.1

Fixed in: newer than 0.4.1

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls safe-eval

2. UPGRADE to newer than 0.4.1

npm install safe-eval@">0.4.1"

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-2023-26122?

safe-eval: upgrade to newer than 0.4.1. Exact commands for each OS are on this page.

Is CVE-2023-26122 being exploited?

CVE-2023-26122 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-2023-26122 affect?

CVE-2023-26122 affects safe-eval. Severity is high (CVSS 8.8). All versions of the package safe-eval are vulnerable to Sandbox Bypass due to improper input sanitization. The vulnerability is derived from prototype pollution exploitation. Exploiting this vulnerability might result in remote code executi

How urgent is CVE-2023-26122?

Priority 56/100. High severity; Public exploit reference

Related CVEs

CVE-2023-26121 HIGH 7.5 UPGRADE All versions of the package safe-eval are vulnerable to Prototype Pollution via the safeEval function, due to
CVE-2022-25904 HIGH 7.5 UPGRADE All versions of package safe-eval are vulnerable to Prototype Pollution which allows an attacker to add or mod

References

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