CVE-2026-86716

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Source

https://cve.org/CVERecord?id=CVE-2026-86716

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86716.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-86716

Published

2026-09-08T18:45:05Z

Modified

2026-10-28T02:31:03Z

Severity

5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator

Summary

Cesanta mJS mjs_tok.c skip_spaces_and_comments heap-based overflow

Details

A vulnerability was determined in Cesanta mJS up to 1.26. Affected is the function skip_spaces_and_comments of the file src/mjs_tok.c. Executing a manipulation can lead to heap-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

Database specific

{
    "cna_assigner":  "VulDB",
    "cwe_ids":  [
        "CWE-119",
        "CWE-122"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86716.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "introduced":  "1.0"
                        },
                        {
                            "last_affected":  "1.0"
                        },
                        {
                            "introduced":  "1.1"
                        },
                        {
                            "last_affected":  "1.1"
                        },
                        {
                            "introduced":  "1.2"
                        },
                        {
                            "last_affected":  "1.2"
                        },
                        {
                            "introduced":  "1.3"
                        },
                        {
                            "last_affected":  "1.3"
                        },
                        {
                            "introduced":  "1.4"
                        },
                        {
                            "last_affected":  "1.4"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StandaloneSingleVersion"
                }
            ]
        }
    ]
}

References

Affected packages

Git / github.com/cesanta/mjs

Affected ranges

Type

GIT

Repo

https://github.com/cesanta/mjs

Events

Introduced

422ca2706b4a334584341c2fc7e4c6f125280f69

Last Affected

30aa0f84dbb274afdd95006ed18431e131654cac

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "1.5"
                },
                {
                    "last_affected":  "1.5"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.6"
                },
                {
                    "last_affected":  "1.6"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.7"
                },
                {
                    "last_affected":  "1.7"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.8"
                },
                {
                    "last_affected":  "1.8"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.9"
                },
                {
                    "last_affected":  "1.9"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.10"
                },
                {
                    "last_affected":  "1.10"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.11"
                },
                {
                    "last_affected":  "1.11"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.12"
                },
                {
                    "last_affected":  "1.12"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.13"
                },
                {
                    "last_affected":  "1.13"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.14"
                },
                {
                    "last_affected":  "1.14"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.15"
                },
                {
                    "last_affected":  "1.15"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.16"
                },
                {
                    "last_affected":  "1.16"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.17"
                },
                {
                    "last_affected":  "1.17"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.18"
                },
                {
                    "last_affected":  "1.18"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.19"
                },
                {
                    "last_affected":  "1.19"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.20"
                },
                {
                    "last_affected":  "1.20"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.21"
                },
                {
                    "last_affected":  "1.21"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.22"
                },
                {
                    "last_affected":  "1.22"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.23"
                },
                {
                    "last_affected":  "1.23"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.24"
                },
                {
                    "last_affected":  "1.24"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.25"
                },
                {
                    "last_affected":  "1.25"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "1.26"
                },
                {
                    "last_affected":  "1.26"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "last_affected":  "1.26"
                }
            ],
            "source":  "DESCRIPTION"
        }
    ]
}

Affected versions

1.*

1.10

1.11

1.12

1.13

1.14

1.15

1.16

1.17

1.18

1.19

1.19.1

1.19.2

1.19.3

1.19.4

1.19.5

1.19.6

1.20

1.20.1

1.21

1.22

1.22.1

1.23

1.24

1.25

1.26

1.5

1.6

1.7

1.8

1.9

Other

ddd

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86716.json"