Vulnerability in Graphql-Hive Graphql-Scalars
CVE-2026-115887
GraphQL Scalars is a library of custom GraphQL scalars for creating precise type-safe GraphQL schemas. From 1.24.1 until 2.0.1, GraphQLPhoneNumber in src/scalars/PhoneNumber.ts uses ambiguous nested digit quantifiers that backtrack exponentially when a PhoneNumber value contains a run of digits followed by a character that makes the match fail. GraphQL evaluates parseLiteral during document validation and parseValue during variable coercion before resolver authentication or authorization, so a small unauthenticated request can block the Node.js event loop and stall the server process. serialize is also affected when unvalidated stored values are returned through the scalar. This issue is fixed in version 2.0.1.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Graphql-Hive Graphql-Scalars — versions >= 1.24.1, < 2.0.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-115887?
- CVE-2026-115887 is a high-severity vulnerability in Graphql-Hive Graphql-Scalars, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2026-10-23.
- How severe is CVE-2026-115887?
- High severity. CVSS v3 base score is 7.5 out of 10.