Secuno
ENNL
Book demo

CVE-2026-104846

Type confusion

9.8 CRITICALEPSS 0.34%
  1. Published2 Oct 2026

Description

Seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. From 0.12.0 until 1.6.2, fromJSON deserialization of a fulfilled Promise control node can pass a plugin-produced callable-bearing thenable to a native Promise resolver. ECMAScript thenable assimilation then invokes the callable unexpectedly, allowing attacker-controlled JSON to trigger code in applications using plugin-capable Seroval releases. This path bypasses the Promise resolver type-confusion remediation in version 1.5.3 for CVE-2026-59940 because the unexpected invocation occurs through native Promise settlement after the referenced value is deserialized. This issue is fixed in version 1.6.2.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-1064338.8
Improper state management in MongoDB libmongocrypt can cause provider-specific data to…
CVE-2026-1064469.8
Handlebars provides the power necessary to let users build semantic templates. From…
CVE-2026-1063748.8
Type confusion in V8 in Google Chrome prior to 155.0.8059.39 allowed a remote attacker…
CVE-2026-1063418.8
Type confusion in V8 in Google Chrome prior to 155.0.8059.39 allowed a remote attacker…
CVE-2026-1062938.3
Type confusion in ANGLE in Google Chrome prior to 155.0.8059.39 allowed a remote…
CVE-2026-1062408.8
Type confusion in V8 in Google Chrome prior to 155.0.8059.39 allowed a remote attacker…

Frequently asked

Is CVE-2026-104846 being actively exploited?

CVE-2026-104846 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.34%.

How severe is CVE-2026-104846?

CVE-2026-104846 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.34% probability of exploitation.

How do I fix CVE-2026-104846?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-104846 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.