Security Digest · Vulnerability record
CVE-2026-58043: nodejs node vulnerability
A flaw in Node.js Permission Model enforcement can over-grant filesystem access across radix-tree prefix boundaries.
CVSS 7.5 High EPSS 0.2% · p4 Patch this week
Should you act?
Normal patch cycle
No exploitation signal; fix it in your next routine update if you are affected. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.2%, percentile 4: FIRST’s model estimates a 0.2% chance of exploitation activity in the next 30 days, higher than 4% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.
- Editorial verdict: Patch this week. Node.js July 2026 Security Releases: HTTP/2 and 11 CVEs — Routine but real: upgrade every supported Node.js line this week, sooner if you terminate HTTP/2 in Node or rely on the Permission Model as a sandbox.
What it is
A flaw in Node.js Permission Model enforcement can over-grant filesystem access across radix-tree prefix boundaries. Under --permission, an attacker who is granted access to one path can abuse boundary handling to read from or write to paths outside the intended filesystem allowlist. This vulnerability affects Node.js main, 22.x, 24.x, and 26.x.
Weakness type: CWE-284.
Product: nodejs node · Assigned by: hackerone · Published: 2026-07-30
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| nodejs | node | 22.23.1 <= 22.23.1, 24.18.0 <= 24.18.0, 26.5.0 <= 26.5.0 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| hackerone | 3.0 | 7.5 High | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N |
- Attack vector: local access needed
- Attack complexity: high (needs special conditions)
- Privileges required: low (any account)
- User interaction: none
- Scope: changed (can affect other components)
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 0.15% probability of exploitation activity in the next 30 days; percentile 4.
Timeline
- — erroneo.us brief: Node.js July 2026 Security Releases: HTTP/2 and 11 CVEs
- — CVE record published by hackerone
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- CVE.org record CVE-2026-58043 cve.org
- NVD entry CVE-2026-58043 nvd.nist.gov
Other references from the CVE record and advisory
- nodejs.org nodejs.org