CVE-2026-72817

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 week
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: None knownExposed: 0

A fix is available — apply it.

go-chi/chi versions 0.9.0 before 5.3.0 contains an IP spoofing vulnerability in the RealIP middleware, which resolves the request source IP (Request.RemoteAddr) using the first IP in the X-Forwarded-For header without validating trusted proxies. A malicious client can prepend a forged IP as the first value of the X-Forwarded-For header to spoof the request source IP, potentially bypassing access controls or falsifying request logs.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

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%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

August 14, 2026

Last Modified

August 17, 2026

Advisory Details (2)

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

go-chi chi 0.9.0 before 5.3.0 IP Spoofing via X-Forwarded-For | Advisories | VulnCheck

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

Potential IP Spoofing via `X-Forwarded-For` Header in `Request.RemoteAddr` Resolution · Advisory · go-chi/chi · GitHub

https://github.com/go-chi/chi/security/advisories/GHSA-9g5q-2w5x-hmxf

Vendor Advisories for CVE-2026-72817(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
redhatspire1-14-main-1.14.7-0.4.hum12026-08-03redhat
redhatspire1-15-main-1.15.2-0.4.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 24× in last 7d / 24× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 19:09 UTCVendor advisory
  3. 2026-08-20 19:09 UTCGHSA enrichment
  4. 2026-08-19 18:26 UTCEG score recompute
  5. 2026-08-19 18:26 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-18 17:12 UTCEG score recompute
  8. 2026-08-18 17:12 UTCGHSA enrichment
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-18 13:49 UTCEPSS rescore
  11. 2026-08-17 16:25 UTCGHSA enrichment
  12. 2026-08-17 14:32 UTCEG score recompute
  13. 2026-08-17 14:32 UTCGHSA enrichment
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 13:49 UTCEG score recompute
  18. 2026-08-16 13:49 UTCGHSA enrichment
  19. 2026-08-16 02:15 UTCEPSS rescore
  20. 2026-08-15 13:06 UTCEG score recompute
  21. 2026-08-15 13:06 UTCGHSA enrichment
  22. 2026-08-14 12:22 UTCEG score recompute
  23. 2026-08-14 11:49 UTCEG score recompute
  24. 2026-08-14 11:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72817?
CVE-2026-72817 is a medium vulnerability published on August 14, 2026. go-chi/chi versions 0.9.0 before 5.3.0 contains an IP spoofing vulnerability in the RealIP middleware, which resolves the request source IP (Request.RemoteAddr) using the first IP in the X-Forwarded-For header without validating trusted proxies. A malicious client can prepend a forged IP as the…
When was CVE-2026-72817 disclosed?
CVE-2026-72817 was first published in the National Vulnerability Database on August 14, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72817 actively exploited?
CVE-2026-72817 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 95.2% of all scored CVEs.
What is the CVSS score of CVE-2026-72817?
CVE-2026-72817 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-72817?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72817, 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-2026-72817

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