CVE-2026-61848: Crass: Non-ASCII characters cause superlinear CPU consumption

October 29, 2026

When parsing an input containing non-ASCII characters, inefficiencies in how Crass tracks the positions of multi-byte characters result in superlinear parsing time. An attacker-controlled input consisting of many non-ASCII characters could cause excessive CPU consumption and potentially denial of service.

References

github.com/advisories/GHSA-8vfg-2r28-hvhj
github.com/rgrove/crass/releases/tag/v1.0.7
github.com/rgrove/crass/security/advisories/GHSA-8vfg-2r28-hvhj
nvd.nist.gov/vuln/detail/CVE-2026-61848

Code Behaviors & Features

Detect and mitigate CVE-2026-61848 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →