GHSA-6976-qm5m-7mcj: viperjs

Package	Ecosystem	Affected	Fixed in
viperjs	crates.io	>=0.0.0-0, <0.2.2	0.2.2

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GHSA-6976-qm5m-7mcj: viperjs versions before 0.2.2 (up to and including 0.2.1) can panic on a BigInt division whose divisor magnitude lands exactly on the engine's internal limb ceiling, and two other BigInt operations return wrong results without any error. An attacker who can supply script run by an embedding application can trigger a denial of service in the host process or get incorrect values. Upgrade to viperjs 0.2.2, which fixes all three behaviours; no workaround is listed.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	OSV

CISA KEV Not listed.
EPSS No score.

Timeline

31 Oct 2026, 14:24 UTC First seen by agentprime
31 Oct 2026, 14:24 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.