How severe is CVE-2026-23736?

CVE-2026-23736 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-23736 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23736?

CVE-2026-23736 affects Lxsmnsyc Seroval. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23736?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-23736 have an EU (EUVD) identifier?

Yes. CVE-2026-23736 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3680.

When was CVE-2026-23736 published?

CVE-2026-23736 was published on 2026-01-21 and last updated on 2026-06-17.

CVE-2026-23736

CVE-2026-23736 is a high-severity vulnerability in Lxsmnsyc Seroval with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1321.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3680
Weakness: CWE-1321
Affected product: Lxsmnsyc Seroval
Published: 2026-01-21
Last modified: 2026-06-17

Description

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.

Frequently asked questions

What is CVE-2026-23736?: seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.
How severe is CVE-2026-23736?: CVE-2026-23736 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-23736 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23736?: CVE-2026-23736 affects Lxsmnsyc Seroval. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23736?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-23736 have an EU (EUVD) identifier?: Yes. CVE-2026-23736 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3680.
When was CVE-2026-23736 published?: CVE-2026-23736 was published on 2026-01-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lxsmnsyc:seroval:*:*:*:*:*:node.js:*:*

More vulnerabilities in Lxsmnsyc Seroval

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