CVE-2023-39332 [Critical] | Path Traversal in Node.js

Various `node:fs` functions allow specifying paths as either strings or `Uint8Array` objects. In Node.js environments, the `Buffer` class extends the `Uint8Array` class. Node.js prevents path traversal through strings (see CVE-2023-30584) and `Buffer` objects (see CVE-2023-32004), but not through non-`Buffer` `Uint8Array` objects. This is distinct from CVE-2023-32004 which only referred to `Buffer` objects. However, the vulnerability follows the same pattern using `Uint8Array` instead of `Buffer`. Please note that at the time this CVE was issued, the permission model is an experimental feature of Node.js.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.52%	1.82%	+1.30%
2	2026-05-29	0.57%	0.52%	-0.05%
3	2026-03-29	—	0.57%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.52%

1.82%

+1.30%

2026-05-29

0.57%

0.52%

-0.05%

2026-03-29

—

0.57%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.8

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.9

[email protected]

OS Trackers for CVE-2023-39332

vendor	priority	summary	link
`alpine`	—	CVE-2023-39332: 2 source package rows (nodejs, nodejs-current); 164 state rows across 13 repos (3.17-main, 3.18-community, 3.18-main, 3.19-community, 3.19-main, 3.20-community, 3.20-main, 3.21-community, 3.21-main, 3.22-community, 3.22-main, edge-community, edge-main); fixed 6, open 158.	https://security.alpinelinux.org/vuln/CVE-2023-39332
`debian`	unimportant	CVE-2023-39332 unimportant priority: Debian including 1 source packages (nodejs), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2023-39332
`gentoo`	high	CVE-2023-39332: 1 GLSA(s) (202505-11), 1 atom(s) (net-libs/nodejs); latest impact high.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2023-39332
`redhat`	high	—	https://access.redhat.com/security/cve/CVE-2023-39332
`suse`	high	CVE-2023-39332 severity important: SUSE including 45 source package names (corepack20-20.8.1-1.1, nodejs-20.8.1-1.module+el8.9.0+20473+c4e3d824, …), 215 product×package rows across 21 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 7.1, … (21 product lines)): Known Not Affected 202, Fixed 13.	https://www.suse.com/security/cve/CVE-2023-39332/
`ubuntu`	medium	CVE-2023-39332 medium priority: Ubuntu including 1 source packages (nodejs), 8 status rows across 8 suites (bionic, focal, jammy, lunar, mantic, trusty, upstream, xenial): not-affected 7, needs-triage 1.	https://ubuntu.com/security/CVE-2023-39332

Affected software / configurations for CVE-2023-39332

Vendor	Product	Version	Raw CPE
nodejs	node.js	>= 20.0.0, < 20.8.0	cpe:2.3:a:nodejs:node.js:::::-:::*
fedoraproject	fedora	39	cpe:2.3:o:fedoraproject:fedora:39:::::::*

References for CVE-2023-39332

URL	Tags
https://hackerone.com/reports/2199818	Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/3N4NJ7FR4X4FPZUGNTQAPSTVB2HB2Y4A/	Mailing List
https://security.netapp.com/advisory/ntap-20231116-0009/	Third Party Advisory
https://security.netapp.com/advisory/ntap-20241108-0002/

URL

CVE-2023-39332

Exploit prediction scoring system (EPSS) score for CVE-2023-39332

Common vulnerability scoring system (CVSS) metrics for CVE-2023-39332

Weakness enumeration for CVE-2023-39332

OS Trackers for CVE-2023-39332

Affected software / configurations for CVE-2023-39332

References for CVE-2023-39332