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expr-eval · Vulnerability

CVSS 3.1 9.8 CRITICALCVSS 4.0 9.2 CRITICALEUVD CVSS 4.0 9.2 CVSS 4.0 · [email protected] · Secondary 9.2 CRITICALCVSS 3.1 · [email protected] · Secondary 9.8 CRITICALCVSS_V3 CVSS_V4 Publisher rating CRITICALCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-12866

Published

All versions of the package expr-eval are vulnerable to Code Execution via the toJSFunction() API. An attacker can execute arbitrary JavaScript by supplying crafted expressions that are compiled into native code using new Function(). Because user-controlled expressions are transformed directly into executable JavaScript, attackers can escape the intended expression sandbox and run arbitrary code within the application's context.

Read the publisher's advisory

euvd · EUVD-2026-38415

Published

All versions of the package expr-eval are vulnerable to Code Execution via the toJSFunction() API. An attacker can execute arbitrary JavaScript by supplying crafted expressions that are compiled into native code using new Function(). Because user-controlled expressions are transformed directly into executable JavaScript, attackers can escape the intended expression sandbox and run arbitrary code within the application's context.

Read the publisher's advisory

nvd · CVE-2026-12866

Published

All versions of the package expr-eval are vulnerable to Code Execution via the toJSFunction() API. An attacker can execute arbitrary JavaScript by supplying crafted expressions that are compiled into native code using new Function(). Because user-controlled expressions are transformed directly into executable JavaScript, attackers can escape the intended expression sandbox and run arbitrary code within the application's context.

Read the publisher's advisory

osv · GHSA-q9v2-7m5w-4693

Published

All versions of the package expr-eval are vulnerable to Code Execution via the toJSFunction() API. An attacker can execute arbitrary JavaScript by supplying crafted expressions that are compiled into native code using new Function(). Because user-controlled expressions are transformed directly into executable JavaScript, attackers can escape the intended expression sandbox and run arbitrary code within the application's context.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-12866

Published

expr-eval

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "product": "expr-eval",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "*",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "vendor": "n/a"
                }

org.webjars.npm:expr-eval

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "product": "org.webjars.npm:expr-eval",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "*",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "vendor": "n/a"
                }

Original source record · Cite this exact observation · Complete original publisher JSON

euvd · EUVD-2026-38415

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jun 23, 2026, 5:00:00 AM

dateUpdated: Aug 14, 2026, 3:25:14 PM

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

nvd · CVE-2026-12866

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-94

Original publisher date fields

published: 2026-06-23T05:17:03.380

lastModified: 2026-07-07T19:16:51.120

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GHSA-q9v2-7m5w-4693

Published

expr-eval

npm

SEMVER · introduced 0 → last_affected 2.0.2

org.webjars.npm:expr-eval

Maven

ECOSYSTEM · introduced 0 → last_affected 2.0.2

1 versions listed as affected

2.0.2

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 13 Nov 06:11 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current