CVE-2026-61503

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-07-13. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Rejetto HFS 3.0.0 through 3.2.0 returns observably different responses from its login endpoint depending on whether the submitted username exists. A remote unauthenticated attacker can use this to confirm valid account names, including the default admin account, facilitating password-guessing and session-forgery attacks.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Jul 13, 2026
Patch available. Sources: github_release.
generic

Rejetto HFS < 3.2.1 Username Enumeration via Login Response Differences | Advisories | VulnCheck

https://www.vulncheck.com/advisories/rejetto-hfs-username-enumeration-via-login-response-differences
github_release Patch Available

3.2.1

Patch available: rejetto/hfs v3.2.1

https://github.com/rejetto/hfs/releases/tag/v3.2.1

Vendor Advisories for CVE-2026-61503(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 83× 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 126 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-61503?
CVE-2026-61503 is a medium vulnerability published on July 13, 2026. Rejetto HFS 3.0.0 through 3.2.0 returns observably different responses from its login endpoint depending on whether the submitted username exists. A remote unauthenticated attacker can use this to confirm valid account names, including the default admin account, facilitating password-guessing and…
When was CVE-2026-61503 disclosed?
CVE-2026-61503 was first published in the National Vulnerability Database on July 13, 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-2026-61503 actively exploited?
CVE-2026-61503 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 63.7% of all scored CVEs.
What is the CVSS score of CVE-2026-61503?
CVE-2026-61503 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-61503?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-61503, 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.

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