CVE-2026-73974

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (5th percentile of EPSS-scored CVEs). 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
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

linuxfabrik-lib provides Python modules for database access, caching, shell execution, and API integrations, and Linuxfabrik Monitoring Plugins uses its shared testing helper across check plugins. Prior to linuxfabrik-lib 6.1.0 and Linuxfabrik Monitoring Plugins 7.0.0, lib.lftest.test() treated the first or second element of a --test CSV argument as a filesystem path and returned the file contents as simulated standard output or standard error without path confinement. The hidden but production-accessible --test argument was accepted by sudo-authorized plugins, so an attacker controlling the nagios or icinga account could use check-plugins/deb-updates/deb-updates with its default QUERY=1 to disclose every line of a root-readable file. Approximately 22 other plugins exposed filtered content or a root file existence and readability oracle through the same helper, while check-plugins/network-bonding/network-bonding and check-plugins/openstack-swift-stat/openstack-swift-stat had direct read paths that bypassed the helper. The library fix confines fixture reads to the invoking plugin's unit-test directory and refuses unsafe anchors, and the plugin fix routes the two bypasses through that helper. These issues are fixed in linuxfabrik-lib 6.1.0 and Linuxfabrik Monitoring Plugins 7.0.0.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
41
EG Risk 41/100CISA SSVC

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
Severity55% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 18, 2026

Last Modified

September 9, 2026

Advisory Details (5)

Auto-updated Aug 18, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, github_commit.
github Patch Available🟡 PoC Available

Arbitrary root file read via live --test argument (lib.lftest) across sudoers-whitelisted plugins (LPE) · Advisory · Linuxfabrik/monitoring-plugins · GitHub

https://github.com/Linuxfabrik/monitoring-plugins/security/advisories/GHSA-rh9c-rqvg-f7pr
github_release Patch Available

v7.0.0

Patch available: Linuxfabrik/monitoring-plugins v7.0.0

https://github.com/Linuxfabrik/monitoring-plugins/releases/tag/v7.0.0
github_commit Patch Available

commit f6680a9e4b39 (Linuxfabrik/monitoring-plugins)

Patch available: Linuxfabrik/monitoring-plugins v7.0.0 (contains commit f6680a9e4b39)

https://github.com/Linuxfabrik/monitoring-plugins/commit/f6680a9e4b39569f318feefdb2f51e5d18c7dad5
github_release Patch Available

v6.1.0

Patch available: Linuxfabrik/lib v6.1.0

https://github.com/Linuxfabrik/lib/releases/tag/v6.1.0
github_commit Patch Available

commit d665042c55fa (Linuxfabrik/lib)

Patch available: Linuxfabrik/lib v6.1.0 (contains commit d665042c55fa)

https://github.com/Linuxfabrik/lib/commit/d665042c55fae83a295ebc0023e8b77f6c473a28

Vendor Advisories for CVE-2026-73974(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)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
linuxfabrik-lib2.0.0.0 ... 6.0.0 (28 versions)
  • every version up to 6.1.0: fixed in 6.1.0
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 45× 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. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-03 17:01 UTCEG score recompute
  3. 2026-10-03 14:26 UTCEPSS rescore
  4. 2026-10-02 09:32 UTCEG score recompute
  5. 2026-10-01 19:50 UTCEPSS rescore
  6. 2026-10-01 09:13 UTCEG score recompute
  7. 2026-09-30 08:54 UTCEG score recompute
  8. 2026-09-29 15:24 UTCEPSS rescore
  9. 2026-09-29 07:55 UTCEG score recompute
  10. 2026-09-28 13:52 UTCEPSS rescore
  11. 2026-09-28 07:36 UTCEG score recompute
  12. 2026-09-27 13:48 UTCEPSS rescore
  13. 2026-09-27 07:18 UTCEG score recompute
  14. 2026-09-26 15:59 UTCEPSS rescore
  15. 2026-09-26 00:28 UTCEPSS rescore
  16. 2026-09-25 03:41 UTCEG score recompute
  17. 2026-09-24 14:04 UTCEPSS rescore
  18. 2026-09-24 03:23 UTCEG score recompute
  19. 2026-09-23 17:54 UTCEPSS rescore
  20. 2026-09-23 03:04 UTCEG score recompute
  21. 2026-09-22 02:45 UTCEG score recompute
  22. 2026-09-21 21:09 UTCEPSS rescore
  23. 2026-09-21 02:26 UTCEG score recompute
  24. 2026-09-20 20:16 UTCEPSS rescore
  25. 2026-09-20 02:07 UTCEG score recompute
Show 56 more
  1. 2026-09-19 01:49 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 01:30 UTCEG score recompute
  4. 2026-09-17 01:11 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-16 00:52 UTCEG score recompute
  8. 2026-09-15 03:12 UTCEPSS rescore
  9. 2026-09-14 00:14 UTCEG score recompute
  10. 2026-09-12 23:56 UTCEG score recompute
  11. 2026-09-12 15:02 UTCEPSS rescore
  12. 2026-09-11 23:37 UTCEG score recompute
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-10 22:58 UTCEG score recompute
  15. 2026-09-10 09:35 UTCEPSS rescore
  16. 2026-09-09 02:46 UTCEG score recompute
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-07 08:16 UTCEG score recompute
  19. 2026-09-06 13:48 UTCEPSS rescore
  20. 2026-09-06 07:06 UTCEG score recompute
  21. 2026-09-05 06:45 UTCEG score recompute
  22. 2026-09-04 06:08 UTCEG score recompute
  23. 2026-09-04 05:07 UTCEPSS rescore
  24. 2026-09-03 05:45 UTCEG score recompute
  25. 2026-09-02 14:12 UTCEPSS rescore
  26. 2026-09-02 04:36 UTCEG score recompute
  27. 2026-09-01 13:54 UTCEPSS rescore
  28. 2026-09-01 04:40 UTCEPSS rescore
  29. 2026-09-01 04:40 UTCEPSS rescore
  30. 2026-08-31 03:22 UTCEG score recompute
  31. 2026-08-30 19:18 UTCEPSS rescore
  32. 2026-08-30 19:17 UTCEPSS rescore
  33. 2026-08-30 03:02 UTCEG score recompute
  34. 2026-08-30 01:22 UTCEPSS rescore
  35. 2026-08-29 02:43 UTCEG score recompute
  36. 2026-08-28 21:42 UTCEPSS rescore
  37. 2026-08-27 19:51 UTCEG score recompute
  38. 2026-08-27 14:25 UTCEPSS rescore
  39. 2026-08-26 19:33 UTCEG score recompute
  40. 2026-08-26 14:47 UTCEPSS rescore
  41. 2026-08-25 19:14 UTCEG score recompute
  42. 2026-08-25 13:49 UTCEPSS rescore
  43. 2026-08-24 18:56 UTCEG score recompute
  44. 2026-08-24 14:18 UTCEPSS rescore
  45. 2026-08-23 18:36 UTCEG score recompute
  46. 2026-08-23 00:19 UTCEPSS rescore
  47. 2026-08-22 18:18 UTCEG score recompute
  48. 2026-08-21 23:49 UTCEPSS rescore
  49. 2026-08-21 17:59 UTCEG score recompute
  50. 2026-08-20 22:56 UTCEPSS rescore
  51. 2026-08-20 17:40 UTCEG score recompute
  52. 2026-08-19 17:21 UTCEG score recompute
  53. 2026-08-19 17:04 UTCEPSS rescore
  54. 2026-08-18 22:23 UTCEG score recompute
  55. 2026-08-18 21:23 UTCEG score recompute
  56. 2026-08-18 21:23 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-73974?
CVE-2026-73974 is a medium vulnerability published on August 18, 2026. linuxfabrik-lib provides Python modules for database access, caching, shell execution, and API integrations, and Linuxfabrik Monitoring Plugins uses its shared testing helper across check plugins. Prior to linuxfabrik-lib 6.1.0 and Linuxfabrik Monitoring Plugins 7.0.0, lib.lftest.test() treated the…
When was CVE-2026-73974 disclosed?
CVE-2026-73974 was first published on August 18, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73974 actively exploited?
CVE-2026-73974 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73974?
CVE-2026-73974 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73974?
A fix for CVE-2026-73974 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73974 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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