CVE-2026-54599

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 89% 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
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.4, login.php generates an OIDC state nonce stored in $_SESSION['oidc_state'], but checksession.php dispatches the OIDC callback without comparing the incoming state against the session value. An attacker can trick a victim into visiting a crafted URL, causing Wallos to exchange the attacker's authorization code and log the victim into the attacker's account. This issue has been patched in version 4.9.4.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
50(Track*)
EG Risk 50/100SSVC: 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
Severity75% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

August 31, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Aug 31, 2026
Patch available. Sources: github, github_release.
github_release Patch Available

v4.9.4

Patch available: ellite/Wallos v4.9.4

https://github.com/ellite/Wallos/releases/tag/v4.9.4
github Patch Available

OIDC state parameter never validated — login CSRF / account takeover · Advisory · ellite/Wallos · GitHub

Affected: v4.9.4. Credit:

https://github.com/ellite/Wallos/security/advisories/GHSA-gr2w-m9v4-qm3v

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 44× 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. 2026-09-24 22:19 UTCEG score recompute
  2. 2026-09-24 14:04 UTCEPSS rescore
  3. 2026-09-23 23:48 UTCEG score recompute
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 01:15 UTCEG score recompute
  6. 2026-09-22 02:43 UTCEG score recompute
  7. 2026-09-21 04:06 UTCEG score recompute
  8. 2026-09-20 20:16 UTCEPSS rescore
  9. 2026-09-19 18:13 UTCEG score recompute
  10. 2026-09-18 19:39 UTCEG score recompute
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-17 21:07 UTCEG score recompute
  13. 2026-09-17 19:31 UTCEPSS rescore
  14. 2026-09-16 22:35 UTCEG score recompute
  15. 2026-09-16 14:08 UTCEPSS rescore
  16. 2026-09-16 10:45 UTCEG score recompute
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-15 11:35 UTCEG score recompute
  19. 2026-09-15 03:11 UTCEPSS rescore
  20. 2026-09-14 01:47 UTCEG score recompute
  21. 2026-09-13 16:47 UTCEPSS rescore
  22. 2026-09-12 15:59 UTCEG score recompute
  23. 2026-09-11 17:27 UTCEG score recompute
  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-10 18:16 UTCEG score recompute
Show 19 more
  1. 2026-09-10 09:35 UTCEPSS rescore
  2. 2026-09-09 08:28 UTCEG score recompute
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-07 19:15 UTCEG score recompute
  5. 2026-09-07 16:01 UTCEPSS rescore
  6. 2026-09-06 20:32 UTCEG score recompute
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-05 22:01 UTCEG score recompute
  9. 2026-09-04 23:28 UTCEG score recompute
  10. 2026-09-04 11:21 UTCEG score recompute
  11. 2026-09-04 05:06 UTCEPSS rescore
  12. 2026-09-02 14:15 UTCEG score recompute
  13. 2026-09-02 14:12 UTCEPSS rescore
  14. 2026-09-01 15:42 UTCEG score recompute
  15. 2026-09-01 14:58 UTCEG score recompute
  16. 2026-09-01 13:54 UTCEPSS rescore
  17. 2026-08-31 21:22 UTCEG score recompute
  18. 2026-08-31 20:40 UTCEG score recompute
  19. 2026-08-31 20:39 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-54599?
CVE-2026-54599 is a high vulnerability published on August 31, 2026. Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.4, login.php generates an OIDC state nonce stored in $SESSION['oidcstate'], but checksession.php dispatches the OIDC callback without comparing the incoming state against the session value. An attacker can…
When was CVE-2026-54599 disclosed?
CVE-2026-54599 was first published in the National Vulnerability Database on August 31, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54599 actively exploited?
CVE-2026-54599 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 88.5% of all scored CVEs.
What is the CVSS score of CVE-2026-54599?
CVE-2026-54599 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-54599?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54599, 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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