CVE-2026-72816

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-08-14. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

go-chi/chi through 5.2.1 contains an IP spoofing vulnerability in the RealIP middleware (middleware/realip.go). The realIP() function reads client-controlled headers (True-Client-IP, X-Real-IP, and X-Forwarded-For) and overwrites r.RemoteAddr without verifying that the request originated from a trusted proxy. Attackers can supply arbitrary IP addresses in these headers to bypass IP-based access controls, evade rate limiting and geo-IP restrictions, and pollute audit logs. Fixed in 5.3.0.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
60(Attend)
EG Risk 60/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

August 14, 2026

Last Modified

August 14, 2026

Advisory Details (2)

Auto-updated Aug 14, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

go-chi chi before 5.3.0 IP Spoofing via RealIP Middleware | Advisories | VulnCheck

https://www.vulncheck.com/advisories/go-chi-chi-before-ip-spoofing-via-realip-middleware
github Patch Available🟡 PoC Available

RealIP Middleware allows IP spoofing via unvalidated X-Forwarded-For header · Advisory · go-chi/chi · GitHub

https://github.com/go-chi/chi/security/advisories/GHSA-rjr7-jggh-pgcp

Vendor Advisories for CVE-2026-72816(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatcosign-main-3.1.3-0.1.hum12026-08-12redhat
redhatspire1-15-main-1.15.2-0.4.hum12026-08-03redhat
redhatspire1-14-main-1.14.7-0.4.hum12026-08-03redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 1 ecosystem)
Go(6)
PackageVulnerable rangeFixed inDependents
github.com/go-chi/chi/middleware———
github.com/go-chi/chi/v2/middleware———
github.com/go-chi/chi/v3/middleware———
github.com/go-chi/chi/v4/middleware———
github.com/go-chi/chi/v5—5.3.0—
github.com/go-chi/chi/v5/middleware—5.3.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 25× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 00:24 UTCVendor advisory
  2. 2026-08-21 00:24 UTCGHSA enrichment
  3. 2026-08-19 23:06 UTCEG score recompute
  4. 2026-08-19 23:05 UTCGHSA enrichment
  5. 2026-08-19 17:04 UTCEPSS rescore
  6. 2026-08-18 21:44 UTCEG score recompute
  7. 2026-08-18 21:44 UTCGHSA enrichment
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-17 20:26 UTCEG score recompute
  11. 2026-08-17 20:26 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-16 19:08 UTCEG score recompute
  14. 2026-08-16 19:08 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 02:15 UTCEPSS rescore
  18. 2026-08-15 17:50 UTCGHSA enrichment
  19. 2026-08-14 16:31 UTCEG score recompute
  20. 2026-08-14 16:31 UTCGHSA enrichment
  21. 2026-08-14 15:39 UTCEG score recompute
  22. 2026-08-14 15:39 UTCGHSA enrichment
  23. 2026-08-14 12:22 UTCEG score recompute
  24. 2026-08-14 11:49 UTCEG score recompute
  25. 2026-08-14 11:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72816?
CVE-2026-72816 is a medium vulnerability published on August 14, 2026. go-chi/chi through 5.2.1 contains an IP spoofing vulnerability in the RealIP middleware (middleware/realip.go). The realIP() function reads client-controlled headers (True-Client-IP, X-Real-IP, and X-Forwarded-For) and overwrites r.RemoteAddr without verifying that the request originated from a…
When was CVE-2026-72816 disclosed?
CVE-2026-72816 was first published in the National Vulnerability Database on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72816 actively exploited?
CVE-2026-72816 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 87.3% of all scored CVEs.
What is the CVSS score of CVE-2026-72816?
CVE-2026-72816 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-72816?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72816, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-72816

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