CVE-2026-73191

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreHIGH confidence

Score 6.1 from GitHub Security Advisory published 2026-09-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 0

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

URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Apache Syncope.

When the Syncope SRA is configured for CAS authentication, the target Apereo CAS instance's URL is calculated by unconditionally looking at client-supplied forwarded HTTP headers.

This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.7, from 4.1.0-M0 through 4.1.2.

Users are recommended to upgrade to version 4.0.8 / 4.1.3, which fix this issue.

CVSS v3
6.1
EG Score
6.1(high)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

September 14, 2026

Last Modified

September 14, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
No patch confirmed yet.
generic
https://lists.apache.org/thread/vx9bons1znhdkdpsxwjpy6qqqjc8xqtk

Vendor Advisories for CVE-2026-73191(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 27× in last 7d / 27× 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. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 10:45 UTCEG score recompute
  3. 2026-09-20 10:45 UTCGHSA enrichment
  4. 2026-09-19 12:33 UTCEG score recompute
  5. 2026-09-19 12:33 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 14:22 UTCEG score recompute
  8. 2026-09-18 14:22 UTCGHSA enrichment
  9. 2026-09-17 16:08 UTCGHSA enrichment
  10. 2026-09-16 17:56 UTCEG score recompute
  11. 2026-09-16 17:56 UTCGHSA enrichment
  12. 2026-09-16 14:08 UTCEPSS rescore
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 19:15 UTCEG score recompute
  15. 2026-09-15 19:15 UTCGHSA enrichment
  16. 2026-09-14 21:03 UTCGHSA enrichment
  17. 2026-09-14 20:25 UTCGHSA enrichment
  18. 2026-09-14 19:39 UTCEG score recompute▲ 6.10
  19. 2026-09-14 19:39 UTCGHSA enrichment
  20. 2026-09-14 19:39 UTCMITRE cvelistV5CVSS v3 → 6.1 · severity → MEDIUM
  21. 2026-09-14 19:19 UTCGHSA enrichment
  22. 2026-09-14 19:18 UTCNVD update
  23. 2026-09-14 18:25 UTCGHSA enrichment
  24. 2026-09-14 18:24 UTCMITRE cvelistV5
  25. 2026-09-14 14:29 UTCNVD update
Show 2 more
  1. 2026-09-14 13:30 UTCEG score recompute
  2. 2026-09-14 13:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73191?
CVE-2026-73191 is a medium vulnerability published on September 14, 2026. URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Apache Syncope. When the Syncope SRA is configured for CAS authentication, the target Apereo CAS instance's URL is calculated by unconditionally looking at client-supplied forwarded HTTP headers. This issue affects Apache Syncope:…
When was CVE-2026-73191 disclosed?
CVE-2026-73191 was first published in the National Vulnerability Database on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73191 actively exploited?
CVE-2026-73191 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 78.3% of all scored CVEs.
What is the CVSS score of CVE-2026-73191?
CVE-2026-73191 has a CVSS v3.1 base score of 6.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-73191?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73191, 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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