CVE-2026-43918

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 71% 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
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: None knownExposed: 0

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

FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.0, when a client or staff/admin account is suspended or marked inactive, existing authenticated sessions are not invalidated. The session identity loaders in src/di.php (loggedin_client and loggedin_admin) only reject sessions if the backing account record no longer exists in the database. They do not verify that the account's status is still active. This allows a suspended or deactivated user to retain full access until their session naturally expires. This issue has been fixed in version 0.8.0.

CVSS v3
8.7
EG Score
8.7(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
Severity87% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

July 6, 2026

Last Modified

July 8, 2026

Advisory Details (2)

Auto-updated Jul 7, 2026
Patch available. Sources: github_release, github.
github Patch Available

Suspended or inactive accounts can retain or regain access through existing sessions, API tokens, and password reset flows · Advisory · FOSSBilling/FOSSBilling · GitHub

https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-qv6c-v49w-8g2j
github_release Patch Available

0.8.0

Patch available: FOSSBilling/FOSSBilling 0.8.0

https://github.com/FOSSBilling/FOSSBilling/releases/tag/0.8.0

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 51× 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. 2026-08-27 14:25 UTCEPSS rescore
  2. 2026-08-27 02:47 UTCEG score recompute
  3. 2026-08-26 14:46 UTCEPSS rescore
  4. 2026-08-26 13:54 UTCEG score recompute
  5. 2026-08-25 13:49 UTCEPSS rescore
  6. 2026-08-24 22:35 UTCEG score recompute
  7. 2026-08-24 09:54 UTCEG score recompute
  8. 2026-08-23 07:08 UTCEG score recompute
  9. 2026-08-23 00:19 UTCEPSS rescore
  10. 2026-08-22 05:48 UTCEG score recompute
  11. 2026-08-21 23:49 UTCEPSS rescore
  12. 2026-08-21 04:23 UTCEG score recompute
  13. 2026-08-20 22:55 UTCEPSS rescore
  14. 2026-08-20 02:24 UTCEG score recompute
  15. 2026-08-19 17:04 UTCEPSS rescore
  16. 2026-08-19 00:55 UTCEG score recompute
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-17 23:14 UTCEG score recompute
  19. 2026-08-17 13:47 UTCEPSS rescore
  20. 2026-08-16 21:48 UTCEG score recompute
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 09:08 UTCEG score recompute
  23. 2026-08-16 02:14 UTCEPSS rescore
  24. 2026-08-15 07:51 UTCEG score recompute
  25. 2026-08-15 01:30 UTCEPSS rescore
Show 56 more
  1. 2026-08-12 15:55 UTCEG score recompute
  2. 2026-08-12 13:51 UTCEPSS rescore
  3. 2026-08-11 14:36 UTCEG score recompute
  4. 2026-08-11 13:43 UTCEPSS rescore
  5. 2026-08-11 01:57 UTCEG score recompute
  6. 2026-08-11 00:00 UTCEPSS rescore
  7. 2026-08-10 00:39 UTCEG score recompute
  8. 2026-08-09 13:46 UTCEPSS rescore
  9. 2026-08-08 23:22 UTCEG score recompute
  10. 2026-08-08 16:37 UTCEPSS rescore
  11. 2026-08-07 22:03 UTCEG score recompute
  12. 2026-08-06 20:45 UTCEG score recompute
  13. 2026-08-06 13:46 UTCEPSS rescore
  14. 2026-08-05 19:27 UTCEG score recompute
  15. 2026-08-05 19:17 UTCEPSS rescore
  16. 2026-08-04 16:26 UTCEG score recompute
  17. 2026-08-04 15:10 UTCEPSS rescore
  18. 2026-08-04 10:38 UTCEPSS rescore
  19. 2026-08-02 13:47 UTCEG score recompute
  20. 2026-08-02 02:27 UTCEPSS rescore
  21. 2026-08-01 12:29 UTCEG score recompute
  22. 2026-08-01 04:16 UTCEPSS rescore
  23. 2026-07-30 21:56 UTCEG score recompute
  24. 2026-07-30 16:28 UTCEPSS rescore
  25. 2026-07-30 08:26 UTCEG score recompute
  26. 2026-07-30 01:30 UTCEPSS rescore
  27. 2026-07-28 17:17 UTCEG score recompute
  28. 2026-07-28 15:36 UTCEPSS rescore
  29. 2026-07-27 15:45 UTCEG score recompute
  30. 2026-07-27 14:13 UTCEPSS rescore
  31. 2026-07-27 01:26 UTCEG score recompute
  32. 2026-07-26 14:54 UTCEPSS rescore
  33. 2026-07-26 14:54 UTCEPSS rescore
  34. 2026-07-26 12:46 UTCEG score recompute
  35. 2026-07-25 14:18 UTCEPSS rescore
  36. 2026-07-24 14:17 UTCEPSS rescore
  37. 2026-07-23 14:18 UTCEPSS rescore
  38. 2026-07-23 03:14 UTCEG score recompute
  39. 2026-07-22 14:08 UTCEPSS rescore
  40. 2026-07-21 15:24 UTCEPSS rescore
  41. 2026-07-20 17:08 UTCEPSS rescore
  42. 2026-07-19 14:31 UTCEPSS rescore
  43. 2026-07-19 02:29 UTCEPSS rescore
  44. 2026-07-18 10:04 UTCEPSS rescore
  45. 2026-07-16 17:03 UTCEPSS rescore
  46. 2026-07-15 16:57 UTCEPSS rescore
  47. 2026-07-15 02:00 UTCEPSS rescore
  48. 2026-07-13 22:30 UTCEPSS rescore
  49. 2026-07-13 06:13 UTCEPSS rescore
  50. 2026-07-12 05:46 UTCEPSS rescore
  51. 2026-07-11 08:27 UTCEPSS rescore
  52. 2026-07-09 19:10 UTCEPSS rescore
  53. 2026-07-08 15:16 UTCEPSS rescore
  54. 2026-07-07 13:46 UTCEPSS rescore
  55. 2026-07-06 21:45 UTCEG score recompute
  56. 2026-07-06 21:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43918?
CVE-2026-43918 is a high vulnerability published on July 6, 2026. FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.0, when a client or staff/admin account is suspended or marked inactive, existing authenticated sessions are not invalidated. The session identity loaders in src/di.php (loggedinclient and loggedinadmin)…
When was CVE-2026-43918 disclosed?
CVE-2026-43918 was first published in the National Vulnerability Database 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-2026-43918 actively exploited?
CVE-2026-43918 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 70.8% of all scored CVEs.
What is the CVSS score of CVE-2026-43918?
CVE-2026-43918 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-43918?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43918, 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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