Resolved CVE-2026-4800, CVE-2026-27904, CVE-2026-33532, and CVE-2026-33672.#1509
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The workflow failures are unrelated to the dependency bump. Those failures will be fixed in separate PRs.
Details: The fix for CVE-2021-23337 added validation for the variable option in _.template but did not apply the same validation to options.imports key names. Both paths flow into the same Function() constructor sink. When an application passes untrusted input as options.imports key names, an attacker can inject default-parameter expressions that execute arbitrary code at template compilation time. Additionally, _.template uses assignInWith to merge imports, which enumerates inherited properties via for..in. If Object.prototype has been polluted by any other vector, the polluted keys are copied into the imports object and passed to Function(). Impact: When an application passes untrusted input as options.imports key names to _.template, an attacker can inject default-parameter expressions that execute arbitrary code at template compilation time. Additionally, prototype pollution can be exploited via assignInWith to inject keys into the Function() constructor. Fix: Bumped lodash and lodash-es resolutions to ^4.18.0 in package.json. Version 4.18.0 validates importsKeys against reForbiddenIdentifierChars and replaces assignInWith with assignWith when merging imports. Signed-off-by: KashKondaka <37753523+KashKondaka@users.noreply.github.com>
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Signed-off-by: Thomas Hurney <hurneyt@amazon.com>
…ons. Signed-off-by: Thomas Hurney <hurneyt@amazon.com>
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The unit test workflows are failing because of the |
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Summary
Resolves CVE-2026-4800 (HIGH severity) by bumping
lodashandlodash-esyarn resolutions to^4.18.0inpackage.json.Details
The fix for CVE-2021-23337 added validation for the
variableoption in_.templatebut did not apply the same validation tooptions.importskey names. Both paths flow into the sameFunction()constructor sink.When an application passes untrusted input as
options.importskey names, an attacker can inject default-parameter expressions that execute arbitrary code at template compilation time.Additionally,
_.templateusesassignInWithto merge imports, which enumerates inherited properties viafor..in. IfObject.prototypehas been polluted by any other vector, the polluted keys are copied into the imports object and passed toFunction().Impact
An attacker can inject default-parameter expressions that execute arbitrary code at template compilation time via untrusted
options.importskey names. Prototype pollution can also be exploited viaassignInWith.Fix
lodashandlodash-esresolutions to^4.18.0inpackage.jsonimportsKeysagainstreForbiddenIdentifierCharsand replacesassignInWithwithassignWithTest Plan
lodashandlodash-esresolve to>=4.18.0afteryarn install