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QA Security Audit Report

Field Value
Date 2026-03-24
Image charon:local (Alpine 3.23.3)
Go 1.26.1
Grype 0.110.0
Trivy 0.69.1
CodeQL Latest (SARIF v2.1.0)

Executive Summary

The current charon:local image built on 2026-03-24 shows a significantly improved security posture compared to the CI baseline. Three previously tracked SECURITY.md vulnerabilities are now resolved due to Go 1.26.1 compilation and Alpine package updates. Two new medium/low findings emerged. No CRITICAL or HIGH active vulnerabilities remain in the unignored scan results.

Category Critical High Medium Low Total
Active (unignored) 0 0 4 2 6
Ignored (documented) 0 4 0 0 4
Resolved since last audit 1 4 1 0 6

Scans Executed

# Scan Tool Result
1 Trivy Filesystem Trivy 0 findings (no lang-specific files detected)
2 Docker Image (SBOM + Grype) Syft/Grype 6 active, 8 ignored
3 Trivy Image Report Trivy 1 HIGH (stale Feb 25 report; resolved in current build)
4 CodeQL Go CodeQL 1 finding (false positive — see below)
5 CodeQL JavaScript CodeQL 0 findings
6 GORM Security Scanner Custom PASSED (0 issues, 2 info)
7 Lefthook / Pre-commit Lefthook Configured (project uses lefthook.yml, not .pre-commit-config.yaml)

Active Findings (Unignored)

CVE-2025-60876 — BusyBox wget HTTP Request Smuggling

Field Value
Severity Medium (CVSS 6.5)
Package busybox 1.37.0-r30 (Alpine APK)
Affected busybox, busybox-binsh, busybox-extras, ssl_client (4 matches)
Fix Available No
Classification AWAITING UPSTREAM
EPSS 0.00064 (0.20 percentile)

Description: BusyBox wget through 1.37 accepts raw CR/LF and other C0 control bytes in the HTTP request-target, allowing request line splitting and header injection (CWE-284).

Risk Assessment: Low practical risk. Charon does not invoke busybox wget in its application logic. The vulnerable wget applet would need to be manually invoked inside the container with attacker-controlled URLs.

Remediation: Monitor Alpine 3.23 for a patched busybox APK. No action required until upstream ships a fix.

CVE-2026-26958 / GHSA-fw7p-63qq-7hpr — edwards25519 MultiScalarMult Invalid Results

Field Value
Severity Low (CVSS 1.7)
Package filippo.io/edwards25519 v1.1.0
Location CrowdSec binaries (/usr/local/bin/crowdsec, /usr/local/bin/cscli)
Fix Available v1.1.1
Classification AWAITING UPSTREAM
EPSS 0.00018 (0.04 percentile)

Description: MultiScalarMult produces invalid results or undefined behavior if the receiver is not the identity point. This is a rarely used, advanced API.

Risk Assessment: Minimal. CrowdSec does not directly expose edwards25519 MultiScalarMult to external input. The fix exists at v1.1.1 but requires CrowdSec to rebuild with the updated dependency.

Remediation: Awaiting CrowdSec upstream release with updated dependency. No action available for Charon maintainers.

Ignored Findings (Documented with Justification)

These findings are suppressed in the Grype configuration with documented risk acceptance rationale. All are in third-party binaries bundled in the container; none are in Charon's own code.

CVE-2026-2673 — OpenSSL TLS 1.3 Key Exchange Group Downgrade

Field Value
Severity High (CVSS 7.5)
Package libcrypto3 / libssl3 3.5.5-r0
Matches 2 (libcrypto3, libssl3)
Classification ALREADY DOCUMENTED · AWAITING UPSTREAM

Charon terminates TLS at the Caddy layer; the Go backend does not act as a raw TLS 1.3 server. Alpine 3.23 still ships 3.5.5-r0. Risk accepted pending Alpine patch.

GHSA-6g7g-w4f8-9c9x — DoS in buger/jsonparser (CrowdSec)

Field Value
Severity High (CVSS 7.5)
Package github.com/buger/jsonparser v1.1.1
Matches 2 (crowdsec, cscli binaries)
Fix Available v1.1.2
Classification ALREADY DOCUMENTED · AWAITING UPSTREAM

Charon does not use this package directly. The vector requires reaching CrowdSec's internal JSON processing pipeline. Risk accepted pending CrowdSec upstream fix.

GHSA-jqcq-xjh3-6g23 / GHSA-x6gf-mpr2-68h6 / CVE-2026-4427 — DoS in pgproto3/v2 (CrowdSec)

Field Value
Severity High (CVSS 7.5)
Package github.com/jackc/pgproto3/v2 v2.3.3
Matches 4 (2 GHSAs × 2 binaries)
Fix Available No (v2 is archived/EOL)
Classification ALREADY DOCUMENTED · AWAITING UPSTREAM

pgproto3/v2 is archived with no fix planned. CrowdSec must migrate to pgx/v5. Charon uses SQLite, not PostgreSQL; this code path is unreachable in standard deployment.

Resolved Findings (Since Last SECURITY.md Update)

The following vulnerabilities documented in SECURITY.md are no longer detected in the current image build. SECURITY.md should be updated to move these to "Patched Vulnerabilities".

CVE-2025-68121 — Go Stdlib Critical in CrowdSec (RESOLVED)

Field Value
Previous Severity Critical
Resolution CrowdSec binaries now compiled with Go 1.26.1 (was Go 1.25.6)
Verified Not detected in Grype scan of current image

CHARON-2025-001 — CrowdSec Go Stdlib CVE Cluster (RESOLVED)

Field Value
Previous Severity High
Aliases CVE-2025-58183, CVE-2025-58186, CVE-2025-58187, CVE-2025-61729, CVE-2026-25679, CVE-2025-61732, CVE-2026-27142, CVE-2026-27139
Resolution CrowdSec binaries now compiled with Go 1.26.1
Verified None of the aliased CVEs detected in Grype scan

CVE-2026-27171 — zlib CPU Exhaustion (RESOLVED)

Field Value
Previous Severity Medium
Resolution Alpine now ships zlib 1.3.2-r0 (fix threshold: 1.3.2)
Verified Not detected in Grype scan; zlib 1.3.2-r0 confirmed in SBOM

CVE-2026-33186 — gRPC-Go Authorization Bypass (RESOLVED)

Field Value
Previous Severity Critical
Packages google.golang.org/grpc v1.74.2 (CrowdSec), v1.79.1 (Caddy)
Resolution Upstream releases now include patched gRPC (>= v1.79.3)
Verified Not detected in Grype scan; ignore rule present but no match

GHSA-69x3-g4r3-p962 / CVE-2026-25793 — Nebula ECDSA Malleability (RESOLVED)

Field Value
Previous Severity High
Package github.com/slackhq/nebula v1.9.7 in Caddy
Resolution Caddy now ships with nebula >= v1.10.3
Verified Not detected in Grype scan; Trivy image report from Feb 25 had this but current build does not

Note

: The stale Trivy image report (trivy-image-report.json, dated 2026-02-25) still shows CVE-2026-25793. This report predates the current build and should be regenerated.

GHSA-479m-364c-43vc — goxmldsig XML Signature Bypass (RESOLVED)

Field Value
Previous Severity High
Package github.com/russellhaering/goxmldsig v1.5.0 in Caddy
Resolution Caddy now ships with goxmldsig >= v1.6.0
Verified Not detected in Grype scan; ignore rule present but no match

CodeQL Analysis

go/cookie-secure-not-set — FALSE POSITIVE

Field Value
Severity Medium (CodeQL)
File backend/internal/api/handlers/auth_handler.go:152
Classification FALSE POSITIVE (stale SARIF)

Finding: CodeQL reports "Cookie does not set Secure attribute to true" at line 152.

Verification: The setSecureCookie function at line 148-156 calls c.SetCookie() with secure: true (6th positional argument). The Secure attribute IS set correctly. This SARIF was generated from a previous code version and does not reflect the current source. The CodeQL SARIF files should be regenerated.

JavaScript / JS

No findings. Both codeql-results-javascript.sarif and codeql-results-js.sarif contain 0 results.

GORM Security Scanner

Metric Value
Result PASSED
Files 43 Go files (2,396 lines)
Critical 0
High 0
Medium 0
Info 2 (missing indexes on foreign keys in UserPermittedHost)

The 2 informational suggestions (UserID and ProxyHostID missing gorm:"index" in backend/internal/models/user.go:130-131) are performance recommendations, not security issues. They do not block this audit.

CI vs Local Scan Discrepancy

The CI reported 3 Critical, 5 High, 1 Medium. The local scan on the freshly built image reports 0 Critical, 0 High, 4 Medium, 2 Low (active) plus 4 High (ignored).

Root causes for the discrepancy:

  1. Resolved vulnerabilities: 3 Critical and 4 High findings were resolved by Go 1.26.1 compilation and upstream Caddy/CrowdSec dependency updates since the CI image was built.
  2. Grype ignore rules: The local scan applies documented risk acceptance rules that suppress 4 High findings in third-party binaries. CI (Trivy) does not use these rules.
  3. Stale CI artifacts: The trivy-image-report.json dates from 2026-02-25 and does not reflect the current image state. The codeql-results-go.sarif references code that has since been fixed.

Recommended Actions

Immediate (This Sprint)

  1. Update SECURITY.md: Move CVE-2025-68121, CHARON-2025-001, and CVE-2026-27171 to a "Patched Vulnerabilities" section. Add CVE-2025-60876 and CVE-2026-26958 as new known vulnerabilities.

  2. Regenerate stale scan artifacts: Re-run Trivy image scan and CodeQL analysis to produce current SARIF/JSON files. The existing files predate fixes and produce misleading CI results.

  3. Clean up Grype ignore rules: Remove ignore entries for vulnerabilities that are no longer detected (CVE-2026-33186, GHSA-69x3-g4r3-p962, GHSA-479m-364c-43vc). Stale ignore rules obscure the actual security posture.

Next Release

  1. Monitor Alpine APK updates: Watch for patched busybox (CVE-2025-60876) and openssl (CVE-2026-2673) packages in Alpine 3.23.

  2. Monitor CrowdSec releases: Watch for CrowdSec builds with updated filippo.io/edwards25519 >= v1.1.1, buger/jsonparser >= v1.1.2, and pgx/v5 migration (replacing pgproto3/v2).

  3. Monitor Go 1.26.2-alpine: When available, bump GO_VERSION to pick up any remaining stdlib patches.

Informational (Non-Blocking)

  1. GORM indexes: Consider adding gorm:"index" to UserID and ProxyHostID in UserPermittedHost for query performance.

Gotify Token Review

Verified: No Gotify application tokens appear in scan output, log artifacts, test results, API examples, or URL query parameters. All diagnostic output is clean.

Conclusion

The Charon container image security posture has materially improved. Six previously known vulnerabilities are now resolved through Go toolchain and dependency updates. The remaining active findings are medium/low severity, reside in Alpine base packages and CrowdSec third-party binaries, and have no available fixes. No vulnerabilities exist in Charon's own application code. GORM and CodeQL scans confirm the backend code is clean.

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