CVE Feed

    Dashboard / CVE / CVE-2026-26747

    CVE-2026-26747

    A Host Header Poisoning vulnerability exists in Monica 4.1.2 due to improper handling of the HTTP Host header in app/Providers/AppServiceProvider.php, combined with the default misconfiguration where the "app.force_url" is not set and default is "false". The application generates absolute URLs (such as those used in password reset emails) using the user-supplied Host header. This allows remote attackers to poison the password reset link sent to a victim,

    Published:Feb 20, 2026
    Last Modified:Apr 18, 2026
    EPS:Feb 20, 2026
    EPSS Score:0.00077
    CVSS Score:9.1

    Affected Products

    Vendor
    Monicahq
    Product
    Monica

    Exploits

    https://github.com/hungnqdz/cve-research/blob/main/CVE-2026-26747.md

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2024-54951 (CVSS 5.4) — Monica 4.1.2 is vulnerable to Cross Site Scripting (XSS). A malicious user can create a malformed contact and …
    CVE-2024-54999 (CVSS 6.5) — MonicaHQ v4.1.2 was discovered to contain a Client-Side Injection vulnerability via the last_name parameter th…
    CVE-2024-54996 (CVSS 8.8) — MonicaHQ v4.1.2 was discovered to contain multiple authenticated Client-Side Injection vulnerabilities via the…
    CVE-2024-54994 (CVSS 6.5) — MonicaHQ v4.1.2 was discovered to contain multiple Client-Side Injection vulnerabilities via the first_name an…
    CVE-2024-54998 (CVSS 5.4) — MonicaHQ v4.1.2 was discovered to contain an authenticated Client-Side Injection vulnerability via the Reason …
    CVE-2024-54997 (CVSS 5.4) — MonicaHQ v4.1.1 was discovered to contain an authenticated Client-Side Injection vulnerability via the entry t…
    CVE-2023-50465 (CVSS 5.4) — A stored cross-site scripting (XSS) vulnerability exists in Monica (aka MonicaHQ) 4.0.0 via an SVG document up…
    CVE-2023-30789 (CVSS 5.4) — MonicaHQ version 4.0.0 allows an authenticated remote attacker to execute malicious code in the application vi…
    CVE-2023-1094 (CVSS 8.8) — MonicaHQ version 4.0.0 allows an authenticated remote attacker to execute malicious code in the application vi…
    CVE-2023-1031 (CVSS 8.8) — MonicaHQ version 4.0.0 allows an authenticated remote attacker to execute malicious code in the application vi…

    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