CVE-2026-72816

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM 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 — 4 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: 0.3%CVSS: 6.5Exploit: Elevated riskExposed services: Not assessed

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
6.5MEDIUMmedium confidence
EG Risk
60
EG Risk 60/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 14, 2026

Last Modified

September 9, 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(5)

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 / EcosystemFix (by version range) / 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

(9 across 4 ecosystems)
Go(6)
PackageVulnerable rangeFix by version rangeDependents
github.com/go-chi/chi/middleware—
  • every version through 1.5.5: no fix on record
—
github.com/go-chi/chi/v2/middleware—
  • every version through 2.1.1: no fix on record
—
github.com/go-chi/chi/v3/middleware—
  • every version through 3.3.5: no fix on record
—
github.com/go-chi/chi/v4/middleware—
  • every version through 4.1.3: no fix on record
—
github.com/go-chi/chi/v5—
  • every version up to 5.3.0: fixed in 5.3.0
—
github.com/go-chi/chi/v5/middleware—
  • every version up to 5.3.0: fixed in 5.3.0
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-go-chi-chi5.0.7-1 ... 5.3.0-1 (6 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-go-chi-chi5.2.0-1, 5.2.3-1, 5.2.5-1, 5.3.0-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-go-chi-chi5.2.0-1, 5.2.3-1, 5.2.5-1
  • every version up to 5.3.0-1: fixed in 5.3.0-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 90× 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.

Showing the most recent 100 of 169 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 22:13 UTCVendor advisory
  3. 2026-10-04 22:13 UTCGHSA enrichment
  4. 2026-10-03 19:42 UTCEG score recompute
  5. 2026-10-03 19:42 UTCVendor advisory
  6. 2026-10-03 19:42 UTCGHSA enrichment
  7. 2026-10-03 14:26 UTCEPSS rescore
  8. 2026-10-02 07:22 UTCEG score recompute
  9. 2026-10-02 07:22 UTCVendor advisory
  10. 2026-10-02 07:22 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-09-30 21:42 UTCEG score recompute
  13. 2026-09-30 21:42 UTCVendor advisory
  14. 2026-09-30 21:42 UTCGHSA enrichment
  15. 2026-09-28 13:52 UTCEPSS rescore
  16. 2026-09-28 10:58 UTCEG score recompute
  17. 2026-09-28 10:58 UTCVendor advisory
  18. 2026-09-28 10:58 UTCGHSA enrichment
  19. 2026-09-27 13:48 UTCEPSS rescore
  20. 2026-09-27 09:39 UTCEG score recompute
  21. 2026-09-27 09:39 UTCVendor advisory
  22. 2026-09-27 09:39 UTCGHSA enrichment
  23. 2026-09-26 15:59 UTCEPSS rescore
  24. 2026-09-25 03:24 UTCEG score recompute
  25. 2026-09-25 03:24 UTCVendor advisory
Show 75 more
  1. 2026-09-25 03:24 UTCGHSA enrichment
  2. 2026-09-23 17:54 UTCEPSS rescore
  3. 2026-09-23 16:42 UTCEG score recompute
  4. 2026-09-23 16:42 UTCVendor advisory
  5. 2026-09-23 16:41 UTCGHSA enrichment
  6. 2026-09-22 15:23 UTCEG score recompute
  7. 2026-09-22 15:23 UTCVendor advisory
  8. 2026-09-22 15:23 UTCGHSA enrichment
  9. 2026-09-21 21:09 UTCEPSS rescore
  10. 2026-09-21 14:03 UTCEG score recompute
  11. 2026-09-21 14:03 UTCVendor advisory
  12. 2026-09-21 14:03 UTCGHSA enrichment
  13. 2026-09-20 20:16 UTCEPSS rescore
  14. 2026-09-20 12:43 UTCEG score recompute
  15. 2026-09-20 12:43 UTCVendor advisory
  16. 2026-09-20 12:43 UTCGHSA enrichment
  17. 2026-09-19 11:11 UTCEG score recompute
  18. 2026-09-19 11:11 UTCVendor advisory
  19. 2026-09-19 11:11 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 08:15 UTCEG score recompute
  22. 2026-09-18 08:15 UTCVendor advisory
  23. 2026-09-18 08:15 UTCGHSA enrichment
  24. 2026-09-17 06:56 UTCEG score recompute
  25. 2026-09-17 06:56 UTCVendor advisory
  26. 2026-09-17 06:56 UTCGHSA enrichment
  27. 2026-09-16 14:08 UTCEPSS rescore
  28. 2026-09-16 05:15 UTCEPSS rescore
  29. 2026-09-16 05:09 UTCVendor advisory
  30. 2026-09-16 05:09 UTCGHSA enrichment
  31. 2026-09-15 03:50 UTCEG score recompute
  32. 2026-09-15 03:50 UTCVendor advisory
  33. 2026-09-15 03:50 UTCGHSA enrichment
  34. 2026-09-15 03:12 UTCEPSS rescore
  35. 2026-09-14 02:31 UTCEG score recompute
  36. 2026-09-14 02:31 UTCVendor advisory
  37. 2026-09-14 02:31 UTCGHSA enrichment
  38. 2026-09-13 01:12 UTCEG score recompute
  39. 2026-09-13 01:12 UTCVendor advisory
  40. 2026-09-13 01:12 UTCGHSA enrichment
  41. 2026-09-12 15:02 UTCEPSS rescore
  42. 2026-09-11 23:53 UTCEG score recompute
  43. 2026-09-11 23:53 UTCVendor advisory
  44. 2026-09-11 23:53 UTCGHSA enrichment
  45. 2026-09-11 14:53 UTCEPSS rescore
  46. 2026-09-10 22:10 UTCEG score recompute
  47. 2026-09-10 22:10 UTCVendor advisory
  48. 2026-09-10 22:10 UTCGHSA enrichment
  49. 2026-09-10 09:35 UTCEPSS rescore
  50. 2026-09-09 20:50 UTCVendor advisory
  51. 2026-09-09 20:50 UTCGHSA enrichment
  52. 2026-09-09 09:17 UTCEG score recompute
  53. 2026-09-09 09:17 UTCVendor advisory
  54. 2026-09-09 09:17 UTCGHSA enrichment
  55. 2026-09-08 22:01 UTCEPSS rescore
  56. 2026-09-08 07:58 UTCEG score recompute
  57. 2026-09-08 07:58 UTCVendor advisory
  58. 2026-09-08 07:58 UTCGHSA enrichment
  59. 2026-09-07 06:40 UTCEG score recompute
  60. 2026-09-07 06:40 UTCVendor advisory
  61. 2026-09-07 06:40 UTCGHSA enrichment
  62. 2026-09-06 13:48 UTCEPSS rescore
  63. 2026-09-06 05:01 UTCEG score recompute
  64. 2026-09-06 05:01 UTCVendor advisory
  65. 2026-09-06 05:01 UTCGHSA enrichment
  66. 2026-09-05 03:43 UTCEG score recompute
  67. 2026-09-05 03:43 UTCVendor advisory
  68. 2026-09-05 03:43 UTCGHSA enrichment
  69. 2026-09-04 05:07 UTCEPSS rescore
  70. 2026-09-04 02:24 UTCVendor advisory
  71. 2026-09-04 02:23 UTCGHSA enrichment
  72. 2026-09-03 00:58 UTCEG score recompute
  73. 2026-09-03 00:58 UTCVendor advisory
  74. 2026-09-03 00:58 UTCGHSA enrichment
  75. 2026-09-02 14:12 UTCEPSS rescore

Related CVEs(same product + same vendor + same CWE)

Same product

4 shown

Go:github.com/go-chi/chi/middleware · Go:github.com/go-chi/chi/v5/middleware · Debian:12:golang-github-go-chi-chi

Same vendor

2 shown

redhat:RHSA-2026:49718

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 on August 14, 2026, with the most recent update on September 9, 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 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72816?
CVE-2026-72816 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-72816?
A fix for CVE-2026-72816 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-72816 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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