YesWiki before 4.6.7 contains a server-side request forgery vulnerability in validateKeyIdUrl() that allows unauthenticated attackers to bypass the… (CVE-2026-104458)
YesWiki versions before 4.6.7 contain a server-side request forgery (SSRF) vulnerability in the validateKeyIdUrl() function. This flaw allows unauthenticated attackers to bypass SSRF protections by exploiting 6to4, NAT64, or IPv4-compatible IPv6 addresses. By sending a crafted Signature keyId to the public actor inbox route, attackers can potentially access cloud metadata services, loopback interfaces, or internal network hosts.
AI Analysis
Technical Summary
The vulnerability in YesWiki prior to version 4.6.7 is a server-side request forgery (CWE-918) in the validateKeyIdUrl() function. It enables unauthenticated attackers to circumvent SSRF guards by leveraging specific IPv6 address formats such as 6to4, NAT64, or IPv4-compatible IPv6 addresses. This bypass allows attackers to send specially crafted Signature keyId values to the public actor inbox route, which can then be used to reach sensitive internal resources including cloud metadata endpoints, loopback services, or other internal hosts.
Potential Impact
Successful exploitation could allow an unauthenticated attacker to access internal network resources that are normally protected from external access. This includes cloud metadata services and loopback interfaces, potentially leading to information disclosure. The CVSS v3.1 score of 6.5 (High) reflects the network attack vector with high confidentiality impact but limited integrity and no availability impact.
Mitigation Recommendations
A fix is available in YesWiki version 4.6.7. Users should upgrade to version 4.6.7 or later to remediate this vulnerability. No other mitigation guidance is provided or necessary once the update is applied.
YesWiki before 4.6.7 contains a server-side request forgery vulnerability in validateKeyIdUrl() that allows unauthenticated attackers to bypass the… (CVE-2026-104458)
Description
YesWiki versions before 4.6.7 contain a server-side request forgery (SSRF) vulnerability in the validateKeyIdUrl() function. This flaw allows unauthenticated attackers to bypass SSRF protections by exploiting 6to4, NAT64, or IPv4-compatible IPv6 addresses. By sending a crafted Signature keyId to the public actor inbox route, attackers can potentially access cloud metadata services, loopback interfaces, or internal network hosts.
CVSS v3.1
Score 6.5medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in YesWiki prior to version 4.6.7 is a server-side request forgery (CWE-918) in the validateKeyIdUrl() function. It enables unauthenticated attackers to circumvent SSRF guards by leveraging specific IPv6 address formats such as 6to4, NAT64, or IPv4-compatible IPv6 addresses. This bypass allows attackers to send specially crafted Signature keyId values to the public actor inbox route, which can then be used to reach sensitive internal resources including cloud metadata endpoints, loopback services, or other internal hosts.
Potential Impact
Successful exploitation could allow an unauthenticated attacker to access internal network resources that are normally protected from external access. This includes cloud metadata services and loopback interfaces, potentially leading to information disclosure. The CVSS v3.1 score of 6.5 (High) reflects the network attack vector with high confidentiality impact but limited integrity and no availability impact.
Mitigation Recommendations
A fix is available in YesWiki version 4.6.7. Users should upgrade to version 4.6.7 or later to remediate this vulnerability. No other mitigation guidance is provided or necessary once the update is applied.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-gg34-f95q-rfgp
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-104458"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6abfee8ea43b0b3b89e55038
Added to database: 10/02/2026, 17:49:02 UTC
Last enriched: 10/02/2026, 17:58:51 UTC
Last updated: 10/02/2026, 21:26:07 UTC
Views: 2
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