CVE-2026-44332

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 57% 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
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fiber is an Express inspired web framework written in Go. Prior to 3.3.0, the default Authorizer function in the BasicAuth middleware in middleware/basicauth/config.go uses short-circuit evaluation that skips password hash comparison for non-existent usernames, enabling reliable remote username enumeration through response timing differences. This issue is fixed in version 3.3.0.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

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
Severity53% × 45%
Exploitation1% × 40%
Automatability100% × 15%
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

Published

July 2, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Jul 8, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
githubMentions a patch (unverified)

Username Enumeration via Timing Oracle in BasicAuth Default Authorizer · Advisory · gofiber/fiber · GitHub

https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8
github_release Patch Available

v3.3.0

Patch available: gofiber/fiber v3.3.0

https://github.com/gofiber/fiber/releases/tag/v3.3.0
github_pr Patch Available

🐛 bug: BasicAuth verifier for unknown users

Patch available: gofiber/fiber v3.3.0 (PR #4245 merged 2026-04-29)

https://github.com/gofiber/fiber/pull/4245
github_commit Patch Available

commit c7ac00edd19f (gofiber/fiber)

Patch available: gofiber/fiber v3.3.0 (contains commit c7ac00edd19f)

https://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059e

Vendor Advisories for CVE-2026-44332(1)

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

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/gofiber/fiber/v3—
  • every version up to 3.3.0: fixed in 3.3.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× 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.

Showing the most recent 100 of 116 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 17:12 UTCEPSS rescore
  4. 2026-10-07 23:48 UTCEPSS rescore
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  10. 2026-09-30 15:03 UTCEPSS rescore
  11. 2026-09-27 13:48 UTCEPSS rescore
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  13. 2026-09-23 17:53 UTCEPSS rescore
  14. 2026-09-23 06:40 UTCEG score recompute
  15. 2026-09-20 20:15 UTCEPSS rescore
  16. 2026-09-18 19:28 UTCEPSS rescore
  17. 2026-09-18 06:16 UTCEG score recompute
  18. 2026-09-17 19:31 UTCEPSS rescore
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  21. 2026-09-13 17:52 UTCEG score recompute
  22. 2026-09-13 16:47 UTCEPSS rescore
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  24. 2026-09-12 14:17 UTCEG score recompute
  25. 2026-09-11 14:53 UTCEPSS rescore
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  1. 2026-09-11 09:37 UTCEPSS rescore
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  3. 2026-09-08 22:00 UTCEPSS rescore
  4. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 13:47 UTCEPSS rescore
  6. 2026-09-05 23:57 UTCEG score recompute
  7. 2026-09-04 05:06 UTCEPSS rescore
  8. 2026-09-02 14:12 UTCEPSS rescore
  9. 2026-09-01 13:54 UTCEPSS rescore
  10. 2026-08-30 19:17 UTCEPSS rescore
  11. 2026-08-30 11:24 UTCEG score recompute
  12. 2026-08-30 01:22 UTCEPSS rescore
  13. 2026-08-28 21:41 UTCEPSS rescore
  14. 2026-08-27 22:16 UTCEG score recompute
  15. 2026-08-27 14:25 UTCEPSS rescore
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  17. 2026-08-25 13:49 UTCEPSS rescore
  18. 2026-08-25 13:47 UTCEG score recompute
  19. 2026-08-24 10:20 UTCEG score recompute
  20. 2026-08-23 07:38 UTCEG score recompute
  21. 2026-08-23 00:19 UTCEPSS rescore
  22. 2026-08-22 06:31 UTCEG score recompute
  23. 2026-08-21 23:49 UTCEPSS rescore
  24. 2026-08-21 05:21 UTCEG score recompute
  25. 2026-08-20 22:55 UTCEPSS rescore
  26. 2026-08-20 04:14 UTCEG score recompute
  27. 2026-08-19 17:04 UTCEPSS rescore
  28. 2026-08-18 20:55 UTCEG score recompute
  29. 2026-08-18 13:48 UTCEPSS rescore
  30. 2026-08-17 17:04 UTCEG score recompute
  31. 2026-08-17 13:47 UTCEPSS rescore
  32. 2026-08-16 15:56 UTCEG score recompute
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  34. 2026-08-16 02:14 UTCEPSS rescore
  35. 2026-08-15 14:50 UTCEG score recompute
  36. 2026-08-15 01:30 UTCEPSS rescore
  37. 2026-08-14 13:43 UTCEG score recompute
  38. 2026-08-13 22:00 UTCEPSS rescore
  39. 2026-08-13 12:36 UTCEG score recompute
  40. 2026-08-12 13:51 UTCEPSS rescore
  41. 2026-08-12 11:30 UTCEG score recompute
  42. 2026-08-11 13:43 UTCEPSS rescore
  43. 2026-08-11 10:22 UTCEG score recompute
  44. 2026-08-11 00:00 UTCEPSS rescore
  45. 2026-08-10 09:16 UTCEG score recompute
  46. 2026-08-09 13:46 UTCEPSS rescore
  47. 2026-08-09 08:09 UTCEG score recompute
  48. 2026-08-08 16:37 UTCEPSS rescore
  49. 2026-08-08 07:03 UTCEG score recompute
  50. 2026-08-07 05:56 UTCEG score recompute
  51. 2026-08-06 13:46 UTCEPSS rescore
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  53. 2026-08-05 19:17 UTCEPSS rescore
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  59. 2026-08-03 01:29 UTCEG score recompute
  60. 2026-08-02 02:27 UTCEPSS rescore
  61. 2026-08-02 00:22 UTCEG score recompute
  62. 2026-08-01 04:16 UTCEPSS rescore
  63. 2026-07-30 22:03 UTCEG score recompute
  64. 2026-07-30 16:28 UTCEPSS rescore
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  66. 2026-07-28 17:35 UTCEG score recompute
  67. 2026-07-28 15:36 UTCEPSS rescore
  68. 2026-07-27 15:53 UTCEG score recompute
  69. 2026-07-27 14:13 UTCEPSS rescore
  70. 2026-07-26 14:54 UTCEPSS rescore
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  72. 2026-07-26 13:06 UTCEG score recompute
  73. 2026-07-25 14:18 UTCEPSS rescore
  74. 2026-07-24 14:17 UTCEPSS rescore
  75. 2026-07-23 14:18 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-44332?
CVE-2026-44332 is a medium vulnerability published on July 2, 2026. Fiber is an Express inspired web framework written in Go. Prior to 3.3.0, the default Authorizer function in the BasicAuth middleware in middleware/basicauth/config.go uses short-circuit evaluation that skips password hash comparison for non-existent usernames, enabling reliable remote username…
When was CVE-2026-44332 disclosed?
CVE-2026-44332 was first published on July 2, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44332 actively exploited?
CVE-2026-44332 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44332?
CVE-2026-44332 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-44332?
A fix for CVE-2026-44332 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-44332 are linked in the Vendor Advisories panel on this page.

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