Vulnerability in github.com/tomwright/dasel/v3 (CVE-2026-46378)
Summary
Vulnerability in github.com/tomwright/dasel/v3 (CVE-2026-46378). Risk of unauthorized operations or information disclosure. Exploitable via dasel. Mitigation: upgrade to 3.10.1 or later.
Original description
The description as published by the source.
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.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-46378 has been found in github.com/tomwright/dasel/v3.
Attackers can target a specific entry point like dasel over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.2/10.
What to do: upgrade github.com/tomwright/dasel/v3 to 3.10.1 or later.
If unsure, ask your IT team or search "github.com/tomwright/dasel/v3 CVE-2026-46378" on the vendor's site.
CVE-2026-46378 (github.com/tomwright/dasel/v3) — CWE-835 / CVSS v3 6.2
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: dasel / fba653c7f248aff10f2b89fca93929b64707dfc8 / master / matchRegexPattern
Patched: 3.10.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-835) exists in github.com/tomwright/dasel/v3. Attackers reach the vulnerable code path via dasel without authentication.
Check the vendor advisory for the affected versions of github.com/tomwright/dasel/v3. Attack surface: dasel / fba653c7f248aff10f2b89fca93929b64707dfc8 / master / matchRegexPattern.
Severity: Medium (CVSS 6.2/10). Risk of unauthorized operations or information disclosure.
Update to 3.10.1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'github.com/tomwright/dasel/v3' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'github.com/tomwright/dasel/v3' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
github.com/tomwright/dasel/v3を grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade github.com/tomwright/dasel/v3 to 3.10.1ステージング環境で 3.10.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-46378 dasel Fixed in: 3.11.0-1
- Ubuntu UBUNTU-CVE-2026-46378 dasel
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- patch github.com
- web github.com