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: 0.2%, top 86% 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
Trending — 3 sources updated this week
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: NoneExposed: 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)
EPSS
14.4%
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 17× in last 7d / 17× 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. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-12 04:36 UTCEG score recompute
  3. 2026-07-11 15:56 UTCEG score recompute
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-11 03:17 UTCEG score recompute
  6. 2026-07-10 14:38 UTCEG score recompute
  7. 2026-07-10 01:56 UTCEG score recompute
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-09 13:16 UTCEG score recompute
  10. 2026-07-09 00:36 UTCEG score recompute
  11. 2026-07-08 15:16 UTCEPSS rescore
  12. 2026-07-08 11:57 UTCEG score recompute
  13. 2026-07-07 23:17 UTCEG score recompute
  14. 2026-07-07 13:46 UTCEPSS rescore
  15. 2026-07-07 10:36 UTCEG score recompute
  16. 2026-07-06 21:45 UTCEG score recompute
  17. 2026-07-06 21:44 UTCMITRE cvelistV5first tracked

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 14.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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.

Dependency Blast Radius

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