CVE-2026-91002

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-09-15. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

A weakness has been identified in stamparm maltrail up to 3.0.1. This vulnerability affects the function _blacklist of the file core/httpd.py of the component Blacklist Endpoint. Executing a manipulation can lead to missing authentication. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 3.1 is able to resolve this issue. This patch is called d95868dff3da4d3bd4f942837a26cb7c73a797ae. It is suggested to upgrade the affected component. The vendor fixed the issue the same day it was reported, in version 3.1, by gating the endpoint on an authenticated session or the new Blacklist_ALLOWLIST option.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 15, 2026

Advisory Details (4)

Auto-updated Sep 15, 2026
Patch available. Sources: github_commit, github_release.
generic

GitHub - stamparm/maltrail: Malicious traffic detection system · GitHub

https://github.com/stamparm/maltrail/
github_release Patch Available

3.1

Patch available: stamparm/maltrail 3.1

https://github.com/stamparm/maltrail/releases/tag/3.1
github_commit

commit d95868dff3da (stamparm/maltrail)

Fix landed in stamparm/maltrail commit d95868dff3da — awaiting tagged release

https://github.com/stamparm/maltrail/commit/d95868dff3da4d3bd4f942837a26cb7c73a797ae
generic

Maltrail /blacklist unauthenticated disclosure of flagged internal source IPs (<=3.0.1, fixed 3.1) · GitHub

https://gist.github.com/simyat/fd48e9c257ab95405c109aec575977f1

Vendor Advisories for CVE-2026-91002(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 20× 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 17:54 UTCGHSA enrichment
  3. 2026-09-19 17:19 UTCEG score recompute
  4. 2026-09-19 17:19 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 16:44 UTCEG score recompute
  7. 2026-09-18 16:44 UTCGHSA enrichment
  8. 2026-09-17 19:32 UTCEPSS rescore
  9. 2026-09-17 16:09 UTCGHSA enrichment
  10. 2026-09-16 15:34 UTCEG score recompute
  11. 2026-09-16 15:34 UTCGHSA enrichment
  12. 2026-09-16 14:09 UTCEPSS rescore
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 14:52 UTCGHSA enrichment
  15. 2026-09-15 14:32 UTCEG score recompute
  16. 2026-09-15 14:32 UTCGHSA enrichment
  17. 2026-09-15 06:28 UTCEG score recompute
  18. 2026-09-15 06:28 UTCNVD updateCVSS v4 → 5.5
  19. 2026-09-15 05:33 UTCEG score recompute
  20. 2026-09-15 05:33 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91002?
CVE-2026-91002 is a medium vulnerability published on September 15, 2026. A weakness has been identified in stamparm maltrail up to 3.0.1. This vulnerability affects the function blacklist of the file core/httpd.py of the component Blacklist Endpoint. Executing a manipulation can lead to missing authentication. The attack can be launched remotely. The exploit has been…
When was CVE-2026-91002 disclosed?
CVE-2026-91002 was first published in the National Vulnerability Database on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91002 actively exploited?
CVE-2026-91002 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 62.0% of all scored CVEs.
What is the CVSS score of CVE-2026-91002?
CVE-2026-91002 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-91002?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91002, 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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