[Japanese]

JVNDB-2026-000125

Multiple vulnerabilities in SOY series

Overview

SOY series provided by Tsuyoshi Saito contain multiple vulnerabilities listed below.
  • Cross-site Scripting (CWE-79) - CVE-2026-73827, CVE-2026-77838, CVE-2026-78238
  • Deserialization of Untrusted Data (CWE-502) - CVE-2026-78032
Shogo Kumamaru of LAC Co., Ltd. reported these vulnerabilities to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 9.8 (Critical) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
CVSS v4 Severity
Base Metrics: 9.3 (Critical) [IPA Score]
  • Access Vector (AV): Network
  • Attack Complexity (AC): Low
  • Attack Requirements (AT): None
  • Privileges Required (PR): None
  • User Interaction (UI): None
    • Vulnerable System Impact
  • Confidentiality Impact (VC): High
  • Integrity Impact (VI): High
  • Availability Impact (VA): High
    • Subsequent System Impact
  • Confidentiality Impact (SC): None
  • Integrity Impact (SI): None
  • Availability Impact (SA): None
The above CVSS base scores have been assigned for CVE-2026-78032

CVSS v3 Severity
Base Metrics: 5.4(Medium) [IPA Score]
  • Access Vector : Network
  • Attack Complexity : Low
  • Privileges Required : Low
  • User Interaction : Required
  • Scope : Changed
  • Confidentiality Impact : Low
  • Integrity Impact : Low
  • Availability Impact : None
CVSS v4 Severity
Base Metrics: 4.8 (Medium) [IPA Score]
  • Access Vector (AV): Network
  • Attack Complexity (AC): Low
  • Attack Requirements (AT): None
  • Privileges Required (PR): Low
  • User Interaction (UI): Active
    • Vulnerable System Impact
  • Confidentiality Impact (VC): None
  • Integrity Impact (VI): None
  • Availability Impact (VA): None
    • Subsequent System Impact
  • Confidentiality Impact (SC): Low
  • Integrity Impact (SI): Low
  • Availability Impact (SA): None
The above CVSS base scores have been assigned for CVE-2026-73827, CVE-2026-77838, CVE-2026-78238
Affected Products


Tsuyoshi Saito
  • SOY Calendar ver 2.4.0 and earlier (CVE-2026-73827, CVE-2026-77838)
  • SOY CMS ver 3.24.0 and earlier (CVE-2026-78032)
  • SOY Gallery ver 2.0.0 and earlier (CVE-2026-78238)

The SOY series provided by Brassica, Inc. is not affected by these vulnerabilities.
Impact

  • An arbitrary script may be executed on the web browser of the user who is logging in to the product (CVE-2026-73827, CVE-2026-77838, CVE-2026-78238).
  • Arbitrary code may be executed by an attacker with the web server privileges (CVE-2026-78032).
Solution

[Update the Software]
Update the software to the latest version according to the information provided by the developer.
Vendor Information

Tsuyoshi Saito
CWE (What is CWE?)

  1. Cross-site Scripting(CWE-79) [IPA Evaluation]
  2. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2026-73827
  2. CVE-2026-77838
  3. CVE-2026-78032
  4. CVE-2026-78238
References

  1. JVN : JVN#04485476
Revision History

  • [2026/08/28]
      Web page was published

Date Public2026/08/28
Date First Published2026/08/28
Date Last Updated2026/08/28