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TI-2026-34094 Aliases CVE-2026-46378GHSA-m6xr-fvfg-5g64

Dasel: Denial of service in dasel selector lexer due to infinite loop on unterminated regex literal

Priority MEDIUM 61CWE-835Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-835.

Summary

Dasel is a command-line tool and library for querying, modifying, and transforming data structures. From 3.0.0 until 3.10.1, the selector lexer matchRegexPattern closure in (*Tokenizer).parseCurRune in selector/lexer/tokenize.go loops while tokenizing an unterminated regex literal such as r/ because peekRuneEqual returns false after the end of input, allowing attacker-controlled selector strings to consume CPU indefinitely. This issue is fixed in version 3.10.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00162 5th percentileScored 2026-11-07
Fix Fixed dasel (TomWright): 3.10.1github.com/tomwright/dasel/v3 (Go): 3.10.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TomWrightdasel3.0.0 to before 3.10.13.10.1Patch availableCNA
—github.com/tomwright/dasel/v3 (Go)3.0.0 to before 3.10.13.10.1Patch availableGHSA-m6xr-fvfg-5g64
  • dasel VendorTomWright Affected 3.0.0 to before 3.10.1 Fixed in 3.10.1 Patch available CNA
  • github.com/tomwright/dasel/v3 (Go) Vendor— Affected 3.0.0 to before 3.10.1 Fixed in 3.10.1 Patch available GHSA-m6xr-fvfg-5g64

Remediation

  • Fix · CNA dasel (TomWright) Fixed in 3.10.1
  • Fix · GHSA-m6xr-fvfg-5g64 github.com/tomwright/dasel/v3 (Go) Fixed in 3.10.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46378
  2. 2026-10-03 Alias added: GHSA-m6xr-fvfg-5g64

References

Other 3

  • TI-2026-44930 Dasel: Selector lexer panics on trailing whitespace in `parseCurRune` CVSS 3.1MEDIUM 6.2
  • TI-2026-34093 Dasel: Index-out-of-range panic in dasel selector lexer on trailing backslash in quoted string CVSS 3.1MEDIUM 6.2
  • TI-2026-25731 Dasel has unbounded YAML alias expansion in dasel leads to CPU/memory denial of service CVSS 3.1MEDIUM 6.2
  • TI-2026-42329 Dasel: Unbounded recursion in JSON and XML readers causes unrecoverable stack-overflow DoS CVSS 3.1MEDIUM 6.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences