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    CVE-2026-86716

    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.

    Published:Sep 8, 2026
    Last Modified:Sep 8, 2026
    EPS:Sep 8, 2026
    EPSS Score:
    CVSS Score:7.3

    Affected Products

    Vendor
    Cesanta
    Product
    Mjs

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2024-35386 (CVSS 7.5) — An issue in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via the mjs_do_gc functio…
    CVE-2023-49552 (CVSS 7.5) — An Out of Bounds Write in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via the mjs…
    CVE-2023-49551 (CVSS 7.5) — An issue in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via the mjs_op_json_parse…
    CVE-2023-49550 (CVSS 7.5) — An issue in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via the mjs+0x4ec508 comp…
    CVE-2023-49553 (CVSS 7.5) — An issue in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via the mjs_destroy funct…
    CVE-2023-49549 (CVSS 7.5) — An issue in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via the mjs_getretvalpos …
    CVE-2023-50044 (CVSS 9.8) — Cesanta MJS 2.20.0 has a getprop_builtin_foreign out-of-bounds read if a Built-in API name occurs in a substri…
    CVE-2023-43338 (CVSS 9.8) — Cesanta mjs v2.20.0 was discovered to contain a function pointer hijacking vulnerability via the function mjs_…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High