CVE Feed

    Dashboard / CVE / CVE-2026-5244

    CVE-2026-5244

    A vulnerability has been found in Cesanta Mongoose up to 7.20. This affects the function mg_tls_recv_cert of the file mongoose.c of the component TLS 1.3 Handler. Such manipulation of the argument pubkey leads to heap-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 7.21 mitigates this issue. The name of the patch is 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

    Published:Apr 2, 2026
    Last Modified:Apr 3, 2026
    EPS:Apr 2, 2026
    EPSS Score:0.00058
    CVSS Score:7.3

    Affected Products

    Vendor
    Cesanta
    Product
    Mongoose

    Exploits

    https://vuldb.com/submit/770063

    Related CVEs

    CVE-2026-73253 (CVSS 9.1) — Mongoose is an embedded web server and network library. Prior to version 7.22, an on-path network attacker wit…
    CVE-2026-73255 (CVSS 6.5) — Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can control an SSI-enab…
    CVE-2026-73259 (CVSS 5.4) — Mongoose is an embedded web server and network library. Prior to 7.22, a remote attacker can send a crafted pe…
    CVE-2026-73256 (CVSS 9.1) — Mongoose is an embedded web server and network library. Prior to 7.22, a remote unauthenticated attacker can e…
    CVE-2026-73254 (CVSS 5.4) — Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can create a file with …
    CVE-2026-73258 (CVSS 6.5) — Mongoose is an embedded web server and network library. Prior to 7.22, a remote attacker can place a lone carr…
    CVE-2026-73251 (CVSS 9.3) — Mongoose is an embedded web server and network library. Prior to 7.23, a network attacker can impersonate a TL…
    CVE-2026-73257 (CVSS 9.1) — Mongoose is an embedded web server and network library. Priro to version 7.22, a remote unauthenticated attack…
    CVE-2026-11404 (CVSS 8.7) — Cesanta Mongoose before 7.22 contains an out-of-bounds read in the built-in TLS server function mg_tls_server_…
    CVE-2026-6986 (CVSS 2.9) — A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This issue affects the function mg_…

    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