CVE-2026-72815

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 67% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 5 sources updated this weekElevated
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.9Exploit: Elevated riskExposed: 0

A fix is available — apply it.

go-chi chi versions >= 5.2.1 and before 5.3.0 contain an IP spoofing vulnerability in the RealIP middleware, which blindly trusts the first (leftmost) value of the X-Forwarded-For HTTP header. A remote attacker can bypass IP-based access control lists and rate-limiting mechanisms, and forge log entries, by supplying a spoofed IP address in the X-Forwarded-For header. The issue is fixed in version 5.3.0.

CVSS v3
6.9
EG Score
6.9(medium)
EG Risk
62(Attend)
EG Risk 62/100SSVC: 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
Severity69% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

August 14, 2026

Last Modified

August 18, 2026

Advisory Details (2)

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

go-chi chi v5.2.1 IP Spoofing via X-Forwarded-For Header | Advisories | VulnCheck

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

IP Spoofing Vulnerability in `middleware.RealIP` · Advisory · go-chi/chi · GitHub

https://github.com/go-chi/chi/security/advisories/GHSA-3fxj-6jh8-hvhx

Vendor Advisories for CVE-2026-72815(5)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatcosign-main-3.1.3-0.1.hum12026-08-12redhat
redhatprometheus3-13-main-3.13.2-0.2.hum12026-08-04redhat
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

(2 across 1 ecosystem)
Go(2)
PackageVulnerable rangeFixed inDependents
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 26× in last 7d / 26× 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 00:59 UTCEG score recompute
  2. 2026-08-21 00:59 UTCVendor advisory
  3. 2026-08-21 00:59 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 01:27 UTCEG score recompute
  6. 2026-08-20 01:27 UTCVendor advisory
  7. 2026-08-20 01:27 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 01:53 UTCEG score recompute
  10. 2026-08-19 01:53 UTCGHSA enrichment
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 02:20 UTCEG score recompute
  14. 2026-08-18 02:20 UTCGHSA enrichment
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 11:01 UTCEG score recompute
  17. 2026-08-17 11:01 UTCGHSA enrichment
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 11:28 UTCEG score recompute
  21. 2026-08-16 11:28 UTCGHSA enrichment
  22. 2026-08-16 02:15 UTCEPSS rescore
  23. 2026-08-15 11:56 UTCGHSA enrichment
  24. 2026-08-14 12:22 UTCEG score recompute
  25. 2026-08-14 11:49 UTCEG score recompute
Show 1 more
  1. 2026-08-14 11:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72815?
CVE-2026-72815 is a medium vulnerability published on August 14, 2026. go-chi chi versions >= 5.2.1 and before 5.3.0 contain an IP spoofing vulnerability in the RealIP middleware, which blindly trusts the first (leftmost) value of the X-Forwarded-For HTTP header. A remote attacker can bypass IP-based access control lists and rate-limiting mechanisms, and forge log…
When was CVE-2026-72815 disclosed?
CVE-2026-72815 was first published in the National Vulnerability Database on August 14, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72815 actively exploited?
CVE-2026-72815 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 66.9% of all scored CVEs.
What is the CVSS score of CVE-2026-72815?
CVE-2026-72815 has a CVSS v3 base score of 6.9 (NVD).
How do I remediate CVE-2026-72815?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72815, 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-2026-72815

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