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  4. CVE 2026 85692 nightingale 911 ssrf guard bypass via ipv6
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Back to active CVEs
High · CVSS 6.5CVE-2026-85692

Nightingale 9.1.1 SSRF Guard Bypass via IPv6 EncodingCVE-2026-85692

Answer in brief

CVE-2026-85692 records a High severity (CVSS 6.5) vulnerability in Nightingale 9.1.1 SSRF Guard Bypass via IPv6 Encoding. The current sources do not mark it as known exploited. The current feed maps ccfos/nightingale (generic), ccfos/nightingale (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 4, 2026Updated Sep 10, 2026Source checked Oct 25, 2026First seen by HOL Sep 4, 2026Material review Sep 10, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps ccfos/nightingale (generic), ccfos/nightingale (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
ccfos/nightingalegeneric0Not reported
ccfos/nightingalegeneric>=0 <=9.1.1Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for ccfos/nightingale, ccfos/nightingale.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Sep 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 4, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

Nightingale (n9e), as of commit 8362cbe (main branch, confirmed 2026-08-27), contains a server-side request forgery vulnerability in the isPublicIP function in aiagent/tools/http.go, the SSRF guard for the http_fetch AI-agent tool. The function only unwraps standard IPv4-mapped (::ffff:a.b.c.d) IPv6 addresses before checking them against the forbidden-range list, and does not classify 6to4 (2002::/16), NAT64 (64:ff9b::/96, 64:ff9b:1::/48), or deprecated site-local (fec0::/10) addresses. On a dual-stack or NAT64-enabled host, an attacker able to supply a URL to the http_fetch tool can bypass the guard by encoding a forbidden IPv4 address (such as the cloud instance-metadata endpoint 169.254.169.254) in one of these IPv6 forms to reach internal or metadata services.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
SSRF
EPSS
Not reported
CWE IDs
CWE-918
Source
CVE List V5
Source checked
Oct 25, 2026
References
4 linked sources
Open source record