by Kastro
Paper/Archive/CVE-2026-23736

CVE-2026-23736

lxsmnsyc seroval — seroval Affected by Prototype Pollution via JSON Deserialization

EPSS 0.3%CVSS 9.8
critical.is priorityof 100
34
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 23.0.230 × 204.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
seroval< 1.4.1–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

refgithub.com/lxsmnsyc/seroval/security/advisories/GHSA-hj76-42vx-jwp4refgithub.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060