Description
seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, improper input handling in the JSON deserialization component can lead to arbitrary JavaScript code execution. Exploitation is possible via overriding constant value and error deserialization, allowing indirect access to unsafe JS evaluation. At minimum, attackers need the ability to perform 4 separate requests on the same function, and partial knowledge of how the serialized data is used during later runtime processing. This vulnerability affects the fromJSON and fromCrossJSON functions in a client-to-server transmission scenario. This issue has been fixed in version 1.4.0.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| lxsmnsyc | seroval | < 1.4.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | opencode | 1.18.26-1.1 | openSUSE-SU-2026:11673-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | seroval | < 1.4.1 | 1.4.1 | GHSA-3rxj-6cgf-8cfw |
Advisories 1
- openSUSE-SU-2026:11673-1 opencode-1.18.26-1.1 on GA media SUSE / openSUSE Security Updates · Sep 3, 2026