GHSA-x8rm-f576-gq67: graphql-scalars (CVE-2026-115887)

Package	Ecosystem	Affected	Fixed in
graphql-scalars	npm	>=1.24.1, <2.0.1	2.0.1

Machine-written summary

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

graphql-scalars versions 1.24.1 up to but not including 2.0.1 have a PhoneNumber scalar whose regular expression can take exponential time on certain inputs. An unauthenticated attacker can send a GraphQL request containing a long run of digits followed by an invalid character, which can stall the server process and cause denial of service, because the scalar runs during document validation. Upgrade graphql-scalars to version 2.0.1 or later.

Written 31 Oct 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	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0049, the 42nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 13:32 UTC First seen by agentprime
31 Oct 2026, 13:32 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.