Security readout for executives and security teams
Plain-English summary
CVE-2026-1145 is a heap-based buffer overflow in quickjs-ng quickjs through 0.11.0. If your product embeds this JavaScript engine and accepts remote or user-supplied JavaScript, an attacker may be able to crash it or affect confidentiality and integrity. Public exploit information is reported, but active exploitation is not confirmed by KEV or the provided sources.
Executive priority
Prioritize remediation for internet-facing or customer-input processing products embedding quickjs-ng. The issue is high severity with public exploit information, but active exploitation is not confirmed. Business risk depends on whether untrusted JavaScript reaches the vulnerable engine.
Technical view
The flaw affects js_typed_array_constructor_ta in quickjs.c and is classified as CWE-119/CWE-122. VulDB rates it CVSS 7.5 with network attack vector, low complexity, no authentication, and partial confidentiality, integrity, and availability impact. The provided patch reference is commit 53aebe66170d545bb6265906fe4324e4477de8b4.
Likely exposure
Exposure is most likely where quickjs-ng quickjs versions 0.1 through 0.11.0 are embedded in applications, services, sandboxes, automation tools, or products that process untrusted JavaScript remotely.
Exploitation context
The source bundle says an exploit has been published and may be used. It does not show CISA KEV listing or confirmed in-the-wild exploitation. Treat the public exploit signal as urgency to patch exposed deployments, without assuming active campaigns.
Researcher notes
Evidence identifies the vulnerable function, affected versions, CWE classes, CVSS vector, public issue, pull request, and patch commit. The bundle does not provide a confirmed fixed release version or KEV status. Avoid assuming impact beyond the stated partial CIA effects.
Mitigation direction
- Identify all direct and embedded quickjs-ng quickjs deployments.
- Prioritize systems processing remote or untrusted JavaScript.
- Apply vendor patch commit 53aebe66170d545bb6265906fe4324e4477de8b4 where applicable.
- If packaging differs, check quickjs-ng guidance before backporting.
- Restrict untrusted JavaScript processing until patched.
Validation and detection
- Confirm quickjs-ng quickjs version is not 0.11.0 or earlier.
- Verify the referenced patch is present in deployed source or package.
- Review the linked GitHub issue and pull request for project-specific status.
- Run regression tests covering typed array construction behavior.
- Document embedded copies in SBOM and dependency inventory.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-119: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-122: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-1145 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (2.0)
- Known Exploited
- No
- Published
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C106.4Primary CVE scoreVulnerability scoring details
Base CVSS 2.0 score
7.5HighVector: AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- VDB-341738 | quickjs-ng quickjs quickjs.c js_typed_array_constructor_ta heap-based overflowCVE reference · vdb-entry, technical-description
- VDB-341738 | CTI Indicators (IOB, IOC, IOA)CVE reference · signature, permissions-required
- Submit #735539 | quickjs-ng quickjs v0.11.0 Heap-based Buffer OverflowCVE reference · third-party-advisory
- https://github.com/quickjs-ng/quickjs/issues/1305CVE reference · issue-tracking, exploit
- https://github.com/quickjs-ng/quickjs/pull/1306CVE reference · issue-tracking
- https://github.com/paralin/quickjs/commit/53aebe66170d545bb6265906fe4324e4477de8b4CVE reference · patch
- https://github.com/quickjs-ng/quickjs/CVE reference · product
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.