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CVE-2026-0821 (GCVE-0-2026-0821)

Vulnerability from cvelistv5 – Published: 2026-01-10 13:02 – Updated: 2026-02-23 08:27 X_Open Source
VLAI
Title
quickjs-ng quickjs quickjs.c js_typed_array_constructor heap-based overflow
Summary
A vulnerability was determined in quickjs-ng quickjs up to 0.11.0. This vulnerability affects the function js_typed_array_constructor of the file quickjs.c. Executing a manipulation can lead to heap-based buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. This patch is called c5d80831e51e48a83eab16ea867be87f091783c5. A patch should be applied to remediate this issue.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-12 14:36 UTC
CWE
Impacted products
Vendor Product Version CPE status
quickjs-ng quickjs Affected: 0.1
Affected: 0.2
Affected: 0.3
Affected: 0.4
Affected: 0.5
Affected: 0.6
Affected: 0.7
Affected: 0.8
Affected: 0.9
Affected: 0.10
Affected: 0.11.0
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Show details on NVD website

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            {
              "descriptions": [
                {
                  "cweId": "CWE-122",
                  "description": "Heap-based Buffer Overflow",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-119",
                  "description": "Memory Corruption",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-02-23T08:27:54.300Z",
            "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
            "shortName": "VulDB"
          },
          "references": [
            {
              "name": "VDB-340355 | quickjs-ng quickjs quickjs.c js_typed_array_constructor heap-based overflow",
              "tags": [
                "vdb-entry",
                "technical-description"
              ],
              "url": "https://vuldb.com/?id.340355"
            },
            {
              "name": "VDB-340355 | CTI Indicators (IOB, IOC, IOA)",
              "tags": [
                "signature",
                "permissions-required"
              ],
              "url": "https://vuldb.com/?ctiid.340355"
            },
            {
              "name": "Submit #731780 | quickjs-ng quickjs v0.11.0 Heap-based Buffer Overflow",
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://vuldb.com/?submit.731780"
            },
            {
              "tags": [
                "issue-tracking"
              ],
              "url": "https://github.com/quickjs-ng/quickjs/issues/1296"
            },
            {
              "tags": [
                "issue-tracking"
              ],
              "url": "https://github.com/quickjs-ng/quickjs/pull/1299"
            },
            {
              "tags": [
                "exploit",
                "issue-tracking"
              ],
              "url": "https://github.com/quickjs-ng/quickjs/issues/1296#issue-3780003395"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/quickjs-ng/quickjs/commit/c5d80831e51e48a83eab16ea867be87f091783c5"
            },
            {
              "tags": [
                "product"
              ],
              "url": "https://github.com/quickjs-ng/quickjs/"
            }
          ],
          "tags": [
            "x_open-source"
          ],
          "timeline": [
            {
              "lang": "en",
              "time": "2026-01-09T00:00:00.000Z",
              "value": "Advisory disclosed"
            },
            {
              "lang": "en",
              "time": "2026-01-09T01:00:00.000Z",
              "value": "VulDB entry created"
            },
            {
              "lang": "en",
              "time": "2026-01-16T01:25:36.000Z",
              "value": "VulDB entry last update"
            }
          ],
          "title": "quickjs-ng quickjs quickjs.c js_typed_array_constructor heap-based overflow"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "assignerShortName": "VulDB",
        "cveId": "CVE-2026-0821",
        "datePublished": "2026-01-10T13:02:07.698Z",
        "dateReserved": "2026-01-09T18:24:17.150Z",
        "dateUpdated": "2026-02-23T08:27:54.300Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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