CVE-2026-46378
High · 7.5Dasel: Denial of service in dasel selector lexer due to infinite loop on unterminated regex literal
CVSS
7.5
EPSS
0.2%
Published
May 19, 2026
CISA due date
—
The record
`dasel`'s selector lexer enters a non-terminating loop when tokenizing an unterminated regex pattern such as `r/abc`. A 2-byte input (`r/`) is sufficient to cause the tokenizer to consume 100% CPU on one core indefinitely. I confirmed the issue on `v3.3.1` (`fba653c7f248aff10f2b89fca93929b64707dfc8`) and on `master` commit `0dd6132e0c58edbd9b1a5f7ffd00dfab1e6085ad`. I also verified the same code path is present in `v3.0.0` (`648f83baf070d9e00db8ff312febef857ec090a3`). No fix is available yet.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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