Engine crash via stale typed-array sort indices
Published Jan 10, 2026 · Updated Jan 10, 2026
Heap-based buffer overflow in QuickJS-NG QuickJS 0.11.0 and earlier allows context-dependent attackers to crash the engine via crafted JavaScript. During js_typed_array_sort, a comparator can shrink a resizable ArrayBuffer after large indices enter array_idx, and the engine then reads array_tmp with those stale indices without rechecking the shortened buffer length. Exploitation requires a host application to execute the crafted script; the public demonstration shows an out-of-bounds read and crash, not arbitrary code execution.
Summary
What happened
Heap-based buffer overflow in QuickJS-NG QuickJS 0.11.0 and earlier allows context-dependent attackers to crash the engine via crafted JavaScript. During js_typed_array_sort, a comparator can shrink a resizable ArrayBuffer after large indices enter array_idx, and the engine then reads array_tmp with those stale indices without rechecking the shortened buffer length. Exploitation requires a host application to execute the crafted script; the public demonstration shows an out-of-bounds read and crash, not arbitrary code execution.
The record
- CVE
- CVE-2026-0822
- Published
- Jan 10, 2026
- Updated
- Jan 10, 2026
- Vendor
- QuickJS-NG
- Product
- QuickJS
- Classifications
- CWE-122, CWE-787, CWE-119, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 10, 2026CVE publishedPublication date reported by the CVE source.
- Jan 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.1
- Affected versionversion=0.10
- Affected versionversion=0.11.0
- Affected versionversion=0.2
- Affected versionversion=0.3
- Affected versionversion=0.4
- Affected versionversion=0.5
- Affected versionversion=0.6
- Affected versionversion=0.7
- Affected versionversion=0.8
- Affected versionversion=0.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Issue 1297 typed-array sort proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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