CVE-2026-46378: Dasel: Denial of service in dasel selector lexer due to infinite loop on unterminated regex literal
Vulnerability summary
CVE-2026-46378 is a medium (CVSS 6.2) Loop with Unreachable Exit Condition vulnerability in tomwright dasel. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.4% of scored vulnerabilities.
Not severe (CVSS 6.2, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1 · Related 2Timeline
- 16-07-2026PublishedVulnerability first disclosed.
- 17-07-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
7 scores · 7 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated6.2MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.2MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · WolfiEcosystem advisory · calculated6.2MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · GoEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
- OSV · ChainguardEcosystem advisory · calculated6.2MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST6.2MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.16%
Chance of exploitation in the next 30 days
Percentile
5%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.16% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Github.com/tomwright/dasel2 products
- v2All versions (No fix recorded)
- v3≥ 3.0.0, < 3.10.1
Chainguard1 product
- vale< 3.14.2-r1
Debian1 product
- dasel< 3.11.0-1
Github.com/tomwright1 product
- daselAll versions (No fix recorded)
Tomwright1 product
- dasel≥ 3.0.0, < 3.10.1
Ubuntu1 product
- daselAll versions (No fix recorded)
Wolfi1 product
- vale< 3.14.2-r1
7 vendors · 8 products
References
8 links- github.com/TomWright/dasel/security/advisories/GHSA-m6xr-fvfg-5g64X Refsource CONFIRMREPORTAdvisoryWEB
- github.com/TomWright/dasel/commit/95f8dd3af12958bf6ca2a737b3ec0267280f86edX Refsource MISCREPORTFIXWEB
- github.com/TomWright/daselPACKAGE