CVE-2026-58404

MEDIUMNVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 69% 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, nvd
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Hugo is a static site generator. From v0.162.0 through v0.163.0, the default security.http.urls policy denies requests to loopback, internal, and cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation, so alternate IPv4 encodings of the same addresses, including integer, hex, or octal, passed the policy. When a template passes an untrusted or data-derived URL to resources.GetRemote and the host platform uses the cgo system resolver, these encodings resolve to the blocked address, allowing build-time server-side requests to loopback and internal services, including the cloud-metadata endpoint in hosted or CI builds; the same check is reused on redirects, so the gap also applies to each redirect hop. This issue is fixed in v0.163.1.

CVSS v3
6.8
EG Score
6.8MEDIUMmedium confidence
EG Risk
31
EG Risk 31/100

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
Severity68% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.4%
EPSS %ILE
28th
KEV
Not listed

Published

July 6, 2026

Last Modified

July 8, 2026

Advisory Details (4)

Auto-updated Jul 7, 2026
Patch available. Sources: github_pr, github_release, github, github_commit.
githubMentions a patch (unverified)

security.http.urls deny rules bypassed by alternate IPv4 encodings (SSRF) · Advisory · gohugoio/hugo · GitHub

Affected: v0.163.1).

https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv
github_release Patch Available

v0.163.1

Patch available: gohugoio/hugo v0.163.1

https://github.com/gohugoio/hugo/releases/tag/v0.163.1
github_pr

Misc adjustments

Fix merged in gohugoio/hugo PR #15020 on 2026-06-10 — awaiting tagged release

https://github.com/gohugoio/hugo/pull/15020
github_commit

commit a00b5c72ac57 (gohugoio/hugo)

Fix landed in gohugoio/hugo commit a00b5c72ac57 — awaiting tagged release

https://github.com/gohugoio/hugo/commit/a00b5c72ac57afe26df6688ece3ca544a56df372

Vendor Advisories for CVE-2026-58404(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhathugo-main-0.163.3-0.1.hum12026-07-08redhat

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 2 ecosystems)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
hugo0.131.0-1 ... 0.162.1-7 (43 versions)
  • every version up to 0.165.0-1: fixed in 0.165.0-1
—
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/gohugoio/hugo—
  • 0.162.0 up to 0.163.1: fixed in 0.163.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 33× 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 167 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-58404?
CVE-2026-58404 is a medium vulnerability published on July 6, 2026. Hugo is a static site generator. From v0.162.0 through v0.163.0, the default security.http.urls policy denies requests to loopback, internal, and cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation, so alternate IPv4 encodings of the same addresses, including…
When was CVE-2026-58404 disclosed?
CVE-2026-58404 was first published on July 6, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58404 actively exploited?
CVE-2026-58404 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (28th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-58404?
CVE-2026-58404 has a CVSS v3 base score of 6.8 (NVD).
How do I remediate CVE-2026-58404?
A fix for CVE-2026-58404 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-58404 are linked in the Vendor Advisories panel on this page.

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