CVE-2026-80200

MEDIUMPre-NVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 77% 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 — 5 sources updated this week
4.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.7Exploit: None knownExposed: 0

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

Kimai before 2.53.0 contains an open redirect vulnerability in the SAML authentication success handler that accepts unvalidated RelayState POST parameters as redirect destinations. Attackers with IdP access can supply malicious RelayState values to redirect authenticated users to attacker-controlled URLs for credential theft or phishing attacks.

CVSS v3
4.7
EG Score
4.7(medium)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity47% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 28, 2026

Advisory Details (2)

Auto-updated Aug 28, 2026
Patch available. Sources: github.
generic

Kimai before 2.53.0 Open Redirect via RelayState | Advisories | VulnCheck

https://www.vulncheck.com/advisories/kimai-before-2.53.0-open-redirect-via-relaystate
github Patch Available

Open Redirect via Unvalidated RelayState in SAML ACS Handler · Advisory · kimai/kimai · GitHub

https://github.com/kimai/kimai/security/advisories/GHSA-3jp4-mhh4-gcgr

Vendor Advisories for CVE-2026-80200(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
kimai/kimai0.1 ... 2.9.0 (198 versions)2.53.0—

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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 15:08 UTCEG score recompute
  3. 2026-08-29 15:08 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-28 16:41 UTCEG score recompute
  6. 2026-08-28 16:41 UTCGHSA enrichment
  7. 2026-08-28 15:32 UTCEG score recompute▲ 4.70
  8. 2026-08-28 15:32 UTCGHSA enrichment
  9. 2026-08-28 15:25 UTCMITRE cvelistV5CVSS v3 → 4.7 · CVSS v4 → 5.3 · severity → MEDIUM
  10. 2026-08-27 14:25 UTCEPSS rescore
  11. 2026-08-26 17:18 UTCNVD update
  12. 2026-08-26 16:21 UTCMITRE cvelistV5
  13. 2026-08-26 15:56 UTCEG score recompute
  14. 2026-08-26 15:43 UTCNVD update
  15. 2026-08-26 14:47 UTCEPSS rescore
  16. 2026-08-25 23:25 UTCEG score recompute
  17. 2026-08-25 23:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-80200?
CVE-2026-80200 is a medium vulnerability published on August 25, 2026. Kimai before 2.53.0 contains an open redirect vulnerability in the SAML authentication success handler that accepts unvalidated RelayState POST parameters as redirect destinations. Attackers with IdP access can supply malicious RelayState values to redirect authenticated users to…
When was CVE-2026-80200 disclosed?
CVE-2026-80200 was first published in the National Vulnerability Database on August 25, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-80200 actively exploited?
CVE-2026-80200 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 79.1% of all scored CVEs.
What is the CVSS score of CVE-2026-80200?
CVE-2026-80200 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2026-80200?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80200, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-80200

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