CVE-2026-46378 json
Dasel: Denial of service in dasel selector lexer due to infinite loop on unterminated regex literal
published 2026-05-19 5 mo ago modified 2026-10-24 15 d ago also GHSA-m6xr-fvfg-5g64 , GO-2026-5493 , EUVD-2026-44994
- cvss
- 6.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 5%
- public exploits
- 0
- none known
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.
Patch / fix
- go github.com/tomwright/dasel/v3 3.10.1
- dasel Debian 14 3.11.0-1
debian advisories DEBIAN-CVE-2026-46378
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/TomWright/dasel/security/advisories/GHSA-m6xr-fvfg-5g64 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/tomwright/dasel/v3 | >=3.0.0, <3.10.1 |
3.10.1 |
| go | github.com/tomwright/dasel | all versions |
no fix listed |
| go | github.com/tomwright/dasel/v2 | all versions |
no fix listed |
Affected products
- TomWright dasel
Classification
- Weakness
-
- CWE-835 Loop with Unreachable Exit Condition
References
Sources
- CVE List CVE-2026-46378
- GitHub Advisory GHSA-m6xr-fvfg-5g64
- NVD CVE-2026-46378
- OSV GO-2026-5493
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