CVE-2026-80197

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory (severity: HIGH) published 2026-08-31. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

Kimai before 2.57.0 contains an improper authorization vulnerability in the favorite timesheet add and remove endpoints that allows authenticated users to manipulate other users' bookmarks. Attackers can add or remove timesheet entries from another user's favorite list by referencing their timesheet identifier, enabling cross-user business-state tampering without administrative privileges.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Kimai before 2.57.0 Improper Authorization via Favorite Endpoints | Advisories | VulnCheck

https://www.vulncheck.com/advisories/kimai-before-2.57.0-improper-authorization-via-favorite-endpoints
github Patch Available🟡 PoC Available

Improper Authorization in Kimai Favorite Timesheet Add and Remove Endpoints Allows Cross-User Bookmark Manipulation · Advisory · kimai/kimai · GitHub

https://github.com/kimai/kimai/security/advisories/GHSA-j5mc-p8qg-39j7

Vendor Advisories for CVE-2026-80197(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 (202 versions)2.57.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 22× in last 7d / 71× 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 22:56 UTCEG score recompute
  2. 2026-09-20 22:56 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 01:04 UTCEG score recompute
  5. 2026-09-20 01:04 UTCGHSA enrichment
  6. 2026-09-19 03:07 UTCEG score recompute
  7. 2026-09-19 03:07 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 05:15 UTCEG score recompute
  10. 2026-09-18 05:15 UTCGHSA enrichment
  11. 2026-09-17 07:23 UTCEG score recompute
  12. 2026-09-17 07:23 UTCGHSA enrichment
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 09:32 UTCEG score recompute
  15. 2026-09-16 09:32 UTCGHSA enrichment
  16. 2026-09-16 05:15 UTCEPSS rescore
  17. 2026-09-15 11:40 UTCEG score recompute
  18. 2026-09-15 11:40 UTCGHSA enrichment
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-14 13:48 UTCEG score recompute
  22. 2026-09-14 13:48 UTCGHSA enrichment
  23. 2026-09-13 15:57 UTCGHSA enrichment
  24. 2026-09-12 18:06 UTCEG score recompute
  25. 2026-09-12 18:06 UTCGHSA enrichment
Show 46 more
  1. 2026-09-11 20:12 UTCEG score recompute
  2. 2026-09-11 20:12 UTCGHSA enrichment
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-10 22:03 UTCEG score recompute
  6. 2026-09-10 22:02 UTCGHSA enrichment
  7. 2026-09-10 00:11 UTCGHSA enrichment
  8. 2026-09-09 01:58 UTCEG score recompute
  9. 2026-09-09 01:58 UTCGHSA enrichment
  10. 2026-09-08 22:01 UTCEPSS rescore
  11. 2026-09-08 04:06 UTCEG score recompute
  12. 2026-09-08 04:06 UTCGHSA enrichment
  13. 2026-09-07 06:14 UTCEG score recompute
  14. 2026-09-07 06:14 UTCGHSA enrichment
  15. 2026-09-06 13:48 UTCEPSS rescore
  16. 2026-09-06 08:19 UTCEG score recompute
  17. 2026-09-06 08:19 UTCGHSA enrichment
  18. 2026-09-05 15:31 UTCEPSS rescore
  19. 2026-09-05 10:27 UTCEG score recompute
  20. 2026-09-05 10:27 UTCGHSA enrichment
  21. 2026-09-04 12:35 UTCEG score recompute
  22. 2026-09-04 12:34 UTCGHSA enrichment
  23. 2026-09-04 05:07 UTCEPSS rescore
  24. 2026-09-03 14:42 UTCGHSA enrichment
  25. 2026-09-02 16:45 UTCEG score recompute
  26. 2026-09-02 16:45 UTCGHSA enrichment
  27. 2026-09-02 14:12 UTCEPSS rescore
  28. 2026-09-01 18:48 UTCEG score recompute
  29. 2026-09-01 18:48 UTCGHSA enrichment
  30. 2026-09-01 13:54 UTCEPSS rescore
  31. 2026-09-01 04:40 UTCEPSS rescore
  32. 2026-09-01 04:40 UTCEPSS rescore
  33. 2026-08-31 05:14 UTCEG score recompute
  34. 2026-08-30 19:18 UTCEPSS rescore
  35. 2026-08-30 19:17 UTCEPSS rescore
  36. 2026-08-30 07:23 UTCEG score recompute
  37. 2026-08-30 01:22 UTCEPSS rescore
  38. 2026-08-29 09:32 UTCEG score recompute
  39. 2026-08-28 21:42 UTCEPSS rescore
  40. 2026-08-28 11:40 UTCEG score recompute
  41. 2026-08-27 14:25 UTCEPSS rescore
  42. 2026-08-26 15:56 UTCEG score recompute
  43. 2026-08-26 14:47 UTCEPSS rescore
  44. 2026-08-26 14:10 UTCEG score recompute
  45. 2026-08-25 23:25 UTCEG score recompute
  46. 2026-08-25 23:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-80197?
CVE-2026-80197 is a medium vulnerability published on August 25, 2026. Kimai before 2.57.0 contains an improper authorization vulnerability in the favorite timesheet add and remove endpoints that allows authenticated users to manipulate other users' bookmarks. Attackers can add or remove timesheet entries from another user's favorite list by referencing their…
When was CVE-2026-80197 disclosed?
CVE-2026-80197 was first published in the National Vulnerability Database on August 25, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-80197 actively exploited?
CVE-2026-80197 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 88.8% of all scored CVEs.
What is the CVSS score of CVE-2026-80197?
CVE-2026-80197 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-80197?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80197, 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-2026-80197

Explore →

Is Your Infrastructure Affected by CVE-2026-80197?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs