quickjs-ng quickjs quickjs.c js_iterator_concat_return use after free
Published Mar 12, 2026
4.8
MEDIUMCVSS 4.0
EPSS 0.16%
Description
A flaw has been found in quickjs-ng quickjs up to 0.12.1. This affects the function js_iterator_concat_return of the file quickjs.c. This manipulation causes use after free. The attack requires local access. The exploit has been published and may be used. Patch name: daab4ad4bae4ef071ed0294618d6244e92def4cd. Applying a patch is the recommended action to fix this issue.
Affected products
-
- Version 0.12.0StatusaffectedConstraints-
- Version 0.12.1StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Quickjs-NG | Quickjs | n/a |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
1 other source (NVD) ▾
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
1 other source (NVD) ▾
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C
1 other source (NVD) ▾
AV:L/AC:L/Au:S/C:P/I:P/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Mar 12, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Mar–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.16% (0.00159) | 4.38th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.11% (0.00112) | 1.66th | v5 (v2026.06.15) |
| Mar 12, 2026 | 0.01% (0.00013) | 1.98th | v4 (v2025.03.14) |
References (8)
- https://github.com/quickjs-ng/quickjs/ product
- https://github.com/quickjs-ng/quickjs/commit/daab4ad4bae4ef071ed0294618d6244e92def4cd patch
- https://github.com/quickjs-ng/quickjs/issues/1368 issue-tracking
- https://github.com/quickjs-ng/quickjs/issues/1368#issue-4004680962 exploitissue-tracking
- https://github.com/quickjs-ng/quickjs/pull/1370 issue-trackingpatch
- https://vuldb.com/?ctiid.350414 signaturepermissions-required
- https://vuldb.com/?id.350414 vdb-entrytechnical-description
- https://vuldb.com/?submit.769600 third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/quickjs-ng/quickjs/ | product | |
| https://github.com/quickjs-ng/quickjs/commit/daab4ad4bae4ef071ed0294618d6244e92def4cd | patch | |
| https://github.com/quickjs-ng/quickjs/issues/1368 | issue-tracking | |
| https://github.com/quickjs-ng/quickjs/issues/1368#issue-4004680962 | exploitissue-tracking | |
| https://github.com/quickjs-ng/quickjs/pull/1370 | issue-trackingpatch | |
| https://vuldb.com/?ctiid.350414 | signaturepermissions-required | |
| https://vuldb.com/?id.350414 | vdb-entrytechnical-description | |
| https://vuldb.com/?submit.769600 | third-party-advisory |
Change history (0)
No recorded changes yet.