Advisory severityHigh7.1Red Hat Linux

High [CVE-2026-104846 +1] `fromJSON ` Promise thenable assimilation invokes plugin-produced callables (bypass of CVE-2026-59940)

This high-severity Red Hat Linux advisory covers CVE-2026-104846 and CVE-2026-59940; related products: Ansible Automation Orchestrator 2026.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations. This bulletin covers 2 CVEs; its score, affected versions and guidance may apply to different issues within that bulletin.

CVE-2026-104846 Source published Oct 3, 2026Source updated Oct 3, 2026

VulniPulse record published Oct 9, 2026Record updated Oct 16, 2026

CVE-2026-104846 CVE-2026-59940

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Summary

`fromJSON()` Promise thenable assimilation invokes plugin-produced callables (bypass of CVE-2026-59940). Red Hat rates this important (CVSS 7.1).

Weakness: CWE-843.

Affected product named by the advisory: Ansible Automation Orchestrator 2026.

Affected versions

1.5.3
0.12.0
1.6.1

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Fixed versions

1.6.2

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the seroval package to version 1.6.2 or later, which adds an isThennable() guard that rejects deserialized Promise values with a .then method.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

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