CVE-2026-18481

HIGHPre-NVD 7.37.3
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 79% 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
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: None knownExposed: 0

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

Stored cross-site scripting in the participant URL handling in AWS Ops Wheel before PR #168 might allow an authenticated remote user to steal session tokens and escalate to full administrative control of the deployed instance via a crafted participant_url value containing a dangerous URI scheme.

To remediate this issue, users should redeploy from the latest version of aws-ops-wheel.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: 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
Severity73% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

July 31, 2026

Last Modified

August 4, 2026

Advisory Details (1)

Auto-updated Jul 31, 2026
No patch confirmed yet.
generic

CVE-2026-18481- Stored XSS in Participant URL Field leads to Account Takeover via Session Token Theft

https://aws.amazon.com/security/security-bulletins/2026-068-aws/

Vendor Advisories for CVE-2026-18481(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 14× in last 7d / 43× 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. 2026-08-21 01:28 UTCEG score recompute
  2. 2026-08-20 22:55 UTCEPSS rescore
  3. 2026-08-20 03:38 UTCEG score recompute
  4. 2026-08-19 17:03 UTCEPSS rescore
  5. 2026-08-18 18:52 UTCEG score recompute
  6. 2026-08-18 13:48 UTCEPSS rescore
  7. 2026-08-17 21:01 UTCEG score recompute
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-16 23:11 UTCEG score recompute
  10. 2026-08-16 14:56 UTCEPSS rescore
  11. 2026-08-16 12:15 UTCEG score recompute
  12. 2026-08-16 02:14 UTCEPSS rescore
  13. 2026-08-15 03:31 UTCEG score recompute
  14. 2026-08-15 01:30 UTCEPSS rescore
  15. 2026-08-14 05:35 UTCEG score recompute
  16. 2026-08-13 22:00 UTCEPSS rescore
  17. 2026-08-12 20:50 UTCEG score recompute
  18. 2026-08-12 13:50 UTCEPSS rescore
  19. 2026-08-11 22:59 UTCEG score recompute
  20. 2026-08-11 13:42 UTCEPSS rescore
  21. 2026-08-11 01:09 UTCEG score recompute
  22. 2026-08-11 00:00 UTCEPSS rescore
  23. 2026-08-09 16:24 UTCEG score recompute
  24. 2026-08-09 13:46 UTCEPSS rescore
  25. 2026-08-08 18:35 UTCEG score recompute
Show 18 more
  1. 2026-08-08 16:37 UTCEPSS rescore
  2. 2026-08-07 20:45 UTCEG score recompute
  3. 2026-08-06 22:55 UTCEG score recompute
  4. 2026-08-06 13:46 UTCEPSS rescore
  5. 2026-08-06 01:05 UTCEG score recompute
  6. 2026-08-05 19:17 UTCEPSS rescore
  7. 2026-08-05 01:50 UTCEG score recompute
  8. 2026-08-04 15:10 UTCEPSS rescore
  9. 2026-08-04 12:26 UTCEG score recompute
  10. 2026-08-04 10:38 UTCEPSS rescore
  11. 2026-08-03 13:53 UTCEG score recompute
  12. 2026-08-03 10:35 UTCEPSS rescore
  13. 2026-08-02 05:08 UTCEG score recompute
  14. 2026-08-02 02:26 UTCEPSS rescore
  15. 2026-07-31 20:22 UTCEG score recompute
  16. 2026-07-31 19:23 UTCEG score recompute
  17. 2026-07-31 18:43 UTCEG score recompute
  18. 2026-07-31 18:43 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-18481?
CVE-2026-18481 is a high vulnerability published on July 31, 2026. Stored cross-site scripting in the participant URL handling in AWS Ops Wheel before PR #168 might allow an authenticated remote user to steal session tokens and escalate to full administrative control of the deployed instance via a crafted participant_url value containing a dangerous URI scheme. To…
When was CVE-2026-18481 disclosed?
CVE-2026-18481 was first published in the National Vulnerability Database on July 31, 2026, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18481 actively exploited?
CVE-2026-18481 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 79.2% of all scored CVEs.
What is the CVSS score of CVE-2026-18481?
CVE-2026-18481 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-18481?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18481, 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

Explore the affected products and dependency analysis for CVE-2026-18481

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Is Your Infrastructure Affected by CVE-2026-18481?

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