CVE-2026-89000

MEDIUMPre-NVD 4.14.1—
EchelonGraph scoreHIGH confidence

Score 4.1 from GitHub Security Advisory published 2026-09-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
4.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.1Exploit: None knownExposed services: Not assessed

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

The WPeMatico RSS Feed Fetcher WordPress plugin before 2.8.27 does not perform a capability check or validate the destination of a user-supplied feed URL before fetching it server-side, allowing users with contributor-level access and above to make the server issue requests to internal-only resources and read the responses back.

CVSS v3
4.1
EG Score
4.1MEDIUMhigh confidence
EG Risk
19
EG Risk 19/100CISA 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
Severity41% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (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

September 27, 2026

Last Modified

September 28, 2026

Advisory Details (1)

Auto-updated Sep 28, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

WPeMatico RSS Feed Fetcher < 2.8.27 – Contributor+ SSRF via Campaign Run | CVE 2026-89000 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/2622b685-d2a9-4bb5-aeef-3aa4ca7adcc4/

Vendor Advisories for CVE-2026-89000(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 20× in last 7d / 28× 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. 2026-10-05 03:34 UTCEG score recompute
  2. 2026-10-05 03:34 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 05:28 UTCEG score recompute
  5. 2026-10-04 05:28 UTCGHSA enrichment
  6. 2026-10-03 07:23 UTCEG score recompute
  7. 2026-10-03 07:23 UTCGHSA enrichment
  8. 2026-10-02 09:17 UTCEG score recompute
  9. 2026-10-02 09:17 UTCGHSA enrichment
  10. 2026-10-01 19:51 UTCEPSS rescore
  11. 2026-10-01 11:12 UTCEG score recompute
  12. 2026-10-01 11:12 UTCGHSA enrichment
  13. 2026-09-30 15:04 UTCEPSS rescore
  14. 2026-09-30 13:07 UTCEG score recompute
  15. 2026-09-30 13:07 UTCGHSA enrichment
  16. 2026-09-29 15:00 UTCEG score recompute
  17. 2026-09-29 15:00 UTCGHSA enrichment
  18. 2026-09-28 16:55 UTCEG score recompute
  19. 2026-09-28 16:55 UTCGHSA enrichment
  20. 2026-09-28 13:52 UTCEPSS rescore
  21. 2026-09-28 02:19 UTCGHSA enrichment
  22. 2026-09-28 01:28 UTCEG score recompute▲ 4.10
  23. 2026-09-28 01:28 UTCGHSA enrichment
  24. 2026-09-28 01:27 UTCMITRE cvelistV5CVSS v3 → 4.1 · severity → MEDIUM
  25. 2026-09-27 13:48 UTCEPSS rescore
Show 3 more
  1. 2026-09-27 06:29 UTCNVD update
  2. 2026-09-27 06:04 UTCEG score recompute
  3. 2026-09-27 06:03 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-89000?
CVE-2026-89000 is a medium vulnerability published on September 27, 2026. The WPeMatico RSS Feed Fetcher WordPress plugin before 2.8.27 does not perform a capability check or validate the destination of a user-supplied feed URL before fetching it server-side, allowing users with contributor-level access and above to make the server issue requests to internal-only…
When was CVE-2026-89000 disclosed?
CVE-2026-89000 was first published on September 27, 2026, with the most recent update on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89000 actively exploited?
CVE-2026-89000 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-89000?
CVE-2026-89000 has a CVSS v3.1 base score of 4.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-89000?
No fix for CVE-2026-89000 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-89000 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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