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CVE-2026-26266 β€” AI Deep Analysis Summary

CVSS 9.3 Β· Critical

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: AliasVault suffers from a Stored XSS vulnerability. πŸ“‰ **Consequences**: Attackers can inject malicious scripts via email rendering.…

Q2Root Cause? (CWE/Flaw)

πŸ›‘οΈ **Root Cause**: CWE-79 (Improper Neutralization of Input During Web Page Generation). The flaw lies in how HTML content is rendered inside an iframe using `srcdoc`.…

Q3Who is affected? (Versions/Components)

🎯 **Affected**: AliasVault versions **0.25.3 and earlier**. Specifically, the email rendering component is vulnerable. Ensure you are not running legacy builds.

Q4What can hackers do? (Privileges/Data)

πŸ’€ **Attacker Capabilities**: Full Stored XSS impact. Hackers can steal cookies, hijack sessions, and perform actions on behalf of the victim. High impact on Confidentiality (C:H) and Integrity (I:H).

Q5Is exploitation threshold high? (Auth/Config)

βš–οΈ **Exploitation Threshold**: Medium. CVSS indicates **UI:R** (User Interaction Required). The victim likely needs to view the malicious email/content.…

Q6Is there a public Exp? (PoC/Wild Exploitation)

πŸ“¦ **Public Exploit**: No specific PoC code is listed in the data. However, the vulnerability is confirmed via GitHub Advisory (GHSA-f65p-p65r-g53q). Theoretical exploitation is straightforward for XSS.

Q7How to self-check? (Features/Scanning)

πŸ” **Self-Check**: Scan for AliasVault instances. Check version numbers against **0.25.3**. Look for email features rendering HTML in iframes. Use DAST tools to test for XSS in email input fields.

Q8Is it fixed officially? (Patch/Mitigation)

βœ… **Official Fix**: Yes. Patched in **Version 0.26.0**. See the GitHub release notes and commit `382e2e96fa502891638a48404f6d82dc972ab481` for details.

Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: Isolate the email rendering feature. Disable HTML rendering in emails if possible. Implement strict Content Security Policy (CSP) headers to mitigate script execution in iframes.

Q10Is it urgent? (Priority Suggestion)

πŸ”₯ **Urgency**: **HIGH**. CVSS Score implies High impact. Stored XSS is dangerous. Update to v0.26.0 immediately. Do not ignore this if you are running older versions.