CVE-2026-81635

Cross‑site scripting in SHIRASAGI allows arbitrary script execution in the browser

Published Sep 10, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
A cross-site scripting vulnerability exists in SHIRASAGI, which may allow an attacker to execute an arbitrary script in the web browser of a user who accesses a website using the affected product.

Analysis

AI-generated

Technical impact

A cross‑site scripting vulnerability exists in the SHIRASAGI project that allows an attacker to embed and execute arbitrary script on a user’s web browser when the user accesses a website powered by the affected product. This weakness permits the injection of malicious JavaScript, potentially leading to hijacked sessions, data theft, or the propagation of malware. The attack is limited to the browser context, so the impact on server confidentiality, integrity, or availability is indirect, but the user’s credentials and personal data can be compromised if the script exfiltrates information or manipulates the page.

Affected Systems

The affected system is the SHIRASAGI project. No specific version information or product sub‑components are provided in the current data; therefore any deployment of SHIRASAGI is considered potentially vulnerable until a vendor patch is applied.

Risk and Exploitability

The CVSS score of 5.1 indicates a moderate risk level. The EPSS score is not available, adding uncertainty to the likelihood of exploitation, and the vulnerability is not listed in CISA’s KEV catalog. Based on the description, the likely attack vector is a malicious URL or user input that triggers the vulnerable page, requiring victim interaction. Because it is a client‑side flaw contingent on browser execution, the risk is confined to users who visit or interact with the affected site, but the potential for widespread damage exists if the malicious script is widely disseminated.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the vendor patch or upgrade to the latest SHIRASAGI release once it is available.
  • If an update is not yet released, disable JavaScript on the affected web pages or use a web filtering solution that blocks injected scripts.
  • Configure a strict Content Security Policy on the web application to restrict allowable script sources and mitigate XSS attacks.
  • Check the vendor’s website or support portal regularly for security advisories and patch releases.

Generated by OpenCVE AI on September 10, 2026 at 07:50 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Shirasagi Project
Shirasagi Project shirasagi
Vendors & Products Shirasagi Project
Shirasagi Project shirasagi
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Cross‑site scripting in SHIRASAGI allows arbitrary script execution in the browser
Type Values Removed Values Added
Description A cross-site scripting vulnerability exists in SHIRASAGI, which may allow an attacker to execute an arbitrary script in the web browser of a user who accesses a website using the affected product.
Weaknesses CWE-79
References
Metrics cvssV3_0

{'score': 5.4, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Weaknesses
  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Sources

Status
PUBLISHED
Assigner
jpcert
Published
Updated
Sep 10, 2026, 1:00 PM
Reserved
Sep 4, 2026, 12:27 AM
Status
Deferred
Published
Sep 10, 2026, 7:17 AM
Modified
Sep 10, 2026, 3:13 PM