Vulnerability in moment (CVE-2026-17495)
Summary
Vulnerability in moment (CVE-2026-17495). Data can be tampered with by attackers. Mitigation: upgrade to 2.31.0 or later.
Original description
The description as published by the source.
moment is a JavaScript date library for parsing, validating, manipulating, and formatting dates. In versions 2.29.2 through 2.30.1, a specially crafted non-string object passed to moment.locale() can bypass the locale-name path-traversal guard. The guard assumes the input is a string, so an object whose match() method satisfies the check while its toString() returns a traversal path reaches an internal require() call with attacker-controlled path segments. This is an incomplete fix for CVE-2022-24785 and primarily affects npm (server-side) users that pass user-provided input directly to moment.locale(). The issue is fixed in moment 2.31.0, and users should upgrade to 2.31.0 or later. As a workaround, validate that any user-supplied input is a string before passing it to moment.locale().
Source: NIST National Vulnerability Database 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-2026-17495 has been found in moment.
Data can be tampered with by attackers. CVSS score: 5.9/10.
What to do: upgrade moment to 2.31.0 or later.
If unsure, ask your IT team or search "moment CVE-2026-17495" on the vendor's site.
CVE-2026-17495 (moment) — CWE-27 / CVSS v3 5.9
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 2.31.0 — apply immediately
Workaround: Validate that any user-supplied input is a string before passing it to moment.locale().
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-27) exists in moment.
Check the vendor advisory for the affected versions of moment.
Severity: Medium (CVSS 5.9/10). Data can be tampered with by attackers.
Update to 2.31.0.
Workaround: Validate that any user-supplied input is a string before passing it to moment.locale().
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'moment' . 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 'moment' . | 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
momentを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
Validate that any user-supplied input is a string before passing it to `moment.locale()`.パッチが適用されるまでの応急処置として、Validate that any user-supplied input is a string before passing it to
moment.locale(). を実施。回避策の副作用 (機能低下) を確認した上で。 -
3Apply patch patch
Upgrade moment to 2.31.0ステージング環境で 2.31.0 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。
-
4Post-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-2026-17495 node-moment
- Ubuntu UBUNTU-CVE-2026-17495 node-moment
References
- advisory cna.openjsf.org
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- web github.com
- web github.com
- web github.com
- web github.com