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CVE-2026-105326

Status: Awaiting AnalysisLow (2.5)—

An argument injection flaw was found in CUPS. When email notification is configured, the CUPS scheduler accepts printer subscription requests that supply a mailto notify-recipient-uri. The mailto notifier passes the recipient address to the configured sendmail program without ensuring it cannot be interpreted as command-line options. A remote attacker who can reach the CUPS service could supply a crafted recipient value starting with "-" to influence sendmail behavior. Successful exploitation depends on the installed mail transfer agent and CUPS network exposure, and may lead to execution of attacker-controlled commands with the privileges of the CUPS service user.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Acceso local (AV:L) sin interacción de usuario que inyecta argumentos en sendmail para ejecutar comandos con privilegios del servicio CUPS, escalando desde usuario local.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Cups — CupsAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-105326",
  "cveTags": [],
  "metrics": {
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-10-06T14:43:04.210560Z"
        }
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    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "secalert@redhat.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 2.5,
          "attackVector": "LOCAL",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
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        "impactScore": 1.4,
        "exploitabilityScore": 1
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  "affected": [
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      "affectedData": [
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          "cpes": [
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          "vendor": "Red Hat",
          "product": "Red Hat Hardened Images",
          "versions": [
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              "version": "2.4.19-4.3.hum1",
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              "versionType": "rpm"
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  "published": "2026-10-05T19:17:16.393",
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      "url": "https://access.redhat.com/errata/RHSA-2026:77638",
      "source": "secalert@redhat.com"
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      "url": "https://access.redhat.com/security/cve/CVE-2026-105326",
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2545835",
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      "url": "https://github.com/OpenPrinting/cups/commit/1244ed9",
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      "url": "https://github.com/OpenPrinting/cups/commit/611d1bd",
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    {
      "url": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-r4wf-366f-f6g3",
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  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
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      "description": [
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          "value": "CWE-88"
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    {
      "lang": "en",
      "value": "An argument injection flaw was found in CUPS. When email notification is configured, the CUPS scheduler accepts printer subscription requests that supply a mailto notify-recipient-uri. The mailto notifier passes the recipient address to the configured sendmail program without ensuring it cannot be interpreted as command-line options. A remote attacker who can reach the CUPS service could supply a crafted recipient value starting with \"-\" to influence sendmail behavior. Successful exploitation depends on the installed mail transfer agent and CUPS network exposure, and may lead to execution of attacker-controlled commands with the privileges of the CUPS service user."
    }
  ],
  "lastModified": "2026-10-07T18:17:15.577",
  "sourceIdentifier": "secalert@redhat.com"
}