CVE-2026-21717
- Source
- https://cve.org/CVERecord?id=CVE-2026-21717
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21717.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-21717
- Aliases
- Downstream
- Related
- Published
- 2026-03-30T19:07:28Z
- Modified
- 2026-08-21T03:46:24Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
A flaw in V8's string hashing mechanism causes integer-like strings to be hashed to their numeric value, making hash collisions trivially predictable. By crafting a request that causes many such collisions in V8's internal string table, an attacker can significantly degrade performance of the Node.js process.
The most common trigger is any endpoint that calls
JSON.parse()on attacker-controlled input, as JSON parsing automatically internalizes short strings into the affected hash table.This vulnerability affects 20.x, 22.x, 24.x, and 25.x.
- Database specific
{ "cna_assigner": "hackerone", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21717.json", "unresolved_ranges": [ { "extracted_events": [ { "introduced": "20.20.1" }, { "last_affected": "20.20.1" }, { "introduced": "22.22.1" }, { "last_affected": "22.22.1" }, { "introduced": "24.14.0" }, { "last_affected": "24.14.0" }, { "introduced": "25.8.1" }, { "last_affected": "25.8.1" }, { "introduced": "4.0" }, { "fixed": "4.*" }, { "introduced": "5.0" }, { "fixed": "5.*" }, { "introduced": "6.0" }, { "fixed": "6.*" }, { "introduced": "7.0" }, { "fixed": "7.*" }, { "introduced": "8.0" }, { "fixed": "8.*" }, { "introduced": "9.0" }, { "fixed": "9.*" }, { "introduced": "10.0" }, { "fixed": "10.*" }, { "introduced": "11.0" }, { "fixed": "11.*" }, { "introduced": "12.0" }, { "fixed": "12.*" }, { "introduced": "13.0" }, { "fixed": "13.*" }, { "introduced": "14.0" }, { "fixed": "14.*" }, { "introduced": "15.0" }, { "fixed": "15.*" }, { "introduced": "16.0" }, { "fixed": "16.*" }, { "introduced": "17.0" }, { "fixed": "17.*" }, { "introduced": "18.0" }, { "fixed": "18.*" }, { "introduced": "19.0" }, { "fixed": "19.*" } ], "source": "AFFECTED_FIELD" } ] }- References
Affected packages
Git / github.com/nodejs/node
Affected ranges
- Type
- GIT
- Repo
- https://github.com/nodejs/node
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast AffectedIntroducedLast AffectedIntroducedLast AffectedIntroducedLast Affected
- Database specific
-
Show details
{ "cpe": "cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*", "extracted_events": [ { "introduced": "0" }, { "last_affected": "20.20.1" }, { "introduced": "22.0.0" }, { "last_affected": "22.22.1" }, { "introduced": "24.0.0" }, { "last_affected": "24.14.0" }, { "introduced": "25.0.0" }, { "last_affected": "25.8.1" } ], "source": "CPE_RANGE" }
Affected versions
v0.*
v0.0.1
v0.0.2
v0.0.3
v0.0.4
v0.0.6
v0.1.0
v0.1.1
v0.1.10
v0.1.100
v0.1.101
v0.1.102
v0.1.103
v0.1.104
v0.1.11
v0.1.12
v0.1.13
v0.1.14
v0.1.15
v0.1.16
v0.1.17
v0.1.18
v0.1.19
v0.1.2
v0.1.20
v0.1.21
v0.1.22
v0.1.23
v0.1.24
v0.1.25
v0.1.26
v0.1.27
v0.1.28
v0.1.29
v0.1.3
v0.1.30
v0.1.31
v0.1.32
v0.1.33
v0.1.4
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.1.9
v0.1.92
v0.1.93
v0.1.94
v0.1.95
v0.1.96
v0.1.97
v0.1.98
v0.1.99
v0.2.0
v0.3.0
v0.3.1
v0.3.2
v0.3.4
v0.3.5
v0.3.6
v0.3.7
v0.3.8
v0.4.0
v0.5.0
v0.5.1
v0.5.10
v0.5.2
v0.5.3
v0.5.4
v0.5.5
v0.5.5-rc1
v0.5.6
v0.5.7
v0.5.8
v0.5.9
v0.6.0
v0.6.1
v0.7.0
v0.7.2
v0.7.3
v1.*
v1.0.1
v1.0.1-release
v1.0.2
v1.0.2-release
v1.0.3
v1.0.4
v1.1.0
v1.2.0
v1.3.0
v1.4.1
v1.4.2
v1.4.3
v1.5.0
v1.5.1
v1.6.0
v1.6.1
v1.6.2
v1.6.3
v1.6.4
v1.7.0
v1.7.1
v2.*
v2.0.0
v2.0.1
v2.0.2
v2.1.0
v2.2.0
v2.2.1
v2.3.0
v2.3.1
v2.3.2
v2.3.3
v2.3.4
v2.4.0
v2.5.0
v20.*
v20.0.0
v20.1.0
v20.10.0
v20.11.0
v20.11.1
v20.12.0
v20.12.1
v20.12.2
v20.13.0
v20.13.1
v20.14.0
v20.15.0
v20.15.1
v20.16.0
v20.17.0
v20.18.0
v20.18.1
v20.18.2
v20.18.3
v20.19.0
v20.19.1
v20.19.2
v20.19.3
v20.19.4
v20.19.5
v20.19.6
v20.2.0
v20.20.0
v20.20.1
v20.3.0
v20.3.1
v20.4.0
v20.5.0
v20.5.1
v20.6.0
v20.6.1
v20.7.0
v20.8.0
v20.8.1
v20.9.0
v22.*
v22.0.0
v22.1.0
v22.10.0
v22.11.0
v22.12.0
v22.13.0
v22.13.1
v22.14.0
v22.15.0
v22.15.1
v22.16.0
v22.17.0
v22.17.1
v22.18.0
v22.19.0
v22.2.0
v22.20.0
v22.21.0
v22.21.1
v22.22.0
v22.22.1
v22.3.0
v22.4.0
v22.4.1
v22.5.0
v22.5.1
v22.6.0
v22.7.0
v22.8.0
v22.9.0
v24.*
v24.0.0
v24.0.1
v24.0.2
v24.1.0
v24.10.0
v24.11.0
v24.11.1
v24.12.0
v24.13.0
v24.13.1
v24.14.0
v24.2.0
v24.3.0
v24.4.0
v24.4.1
v24.5.0
v24.6.0
v24.7.0
v24.8.0
v24.9.0
v25.*
v25.0.0
v25.1.0
v25.2.0
v25.2.1
v25.3.0
v25.4.0
v25.5.0
v25.6.0
v25.6.1
v25.7.0
v25.8.0
v25.8.1
v3.*
v3.0.0