CVE-2026-72587

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreHIGH confidence

Score 6.1 from GitHub Security Advisory published 2026-08-10. a secondary CVSS source baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 0

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

A cache poisoning vulnerability in CoreBunch/Instatic through 0.0.14 allows an unauthenticated remote attacker to poison the shared process-wide render cache by manipulating the u query parameter of the GET /_instatic/hole/ server island endpoint.

CVSS v3
6.1
EG Score
6.1(high)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 10, 2026

Advisory Details (1)

Auto-updated Aug 10, 2026
No patch confirmed yet.
generic

GitHub - CoreBunch/Instatic: The open-source alternative to Webflow, Framer and WordPress. Agentic self-hosted visual CMS outputting clean static pages. Users, roles, plugins, content, database, it's all there. · GitHub

https://github.com/CoreBunch/Instatic

Vendor Advisories for CVE-2026-72587(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 22× in last 7d / 38× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 15:48 UTCEG score recompute
  3. 2026-08-20 15:48 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 15:42 UTCGHSA enrichment
  6. 2026-08-18 15:38 UTCEG score recompute
  7. 2026-08-18 15:38 UTCGHSA enrichment
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-17 15:02 UTCEG score recompute
  11. 2026-08-17 15:02 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-16 14:57 UTCEG score recompute
  14. 2026-08-16 14:57 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 02:15 UTCEPSS rescore
  18. 2026-08-15 14:53 UTCEG score recompute
  19. 2026-08-15 14:53 UTCGHSA enrichment
  20. 2026-08-15 01:31 UTCEPSS rescore
  21. 2026-08-14 14:48 UTCEG score recompute
  22. 2026-08-14 14:48 UTCGHSA enrichment
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-13 14:43 UTCGHSA enrichment
  25. 2026-08-12 14:39 UTCEG score recompute
Show 13 more
  1. 2026-08-12 14:39 UTCGHSA enrichment
  2. 2026-08-12 13:51 UTCEPSS rescore
  3. 2026-08-11 14:34 UTCEG score recompute
  4. 2026-08-11 14:34 UTCGHSA enrichment
  5. 2026-08-10 14:29 UTCEG score recompute
  6. 2026-08-10 14:29 UTCGHSA enrichment
  7. 2026-08-10 13:36 UTCEG score recompute
  8. 2026-08-10 13:36 UTCGHSA enrichment
  9. 2026-08-10 12:23 UTCEG score recompute
  10. 2026-08-10 12:02 UTCEG score recompute
  11. 2026-08-10 11:19 UTCEG score recompute
  12. 2026-08-10 10:57 UTCEG score recompute
  13. 2026-08-10 10:56 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72587?
CVE-2026-72587 is a medium vulnerability published on August 10, 2026. A cache poisoning vulnerability in CoreBunch/Instatic through 0.0.14 allows an unauthenticated remote attacker to poison the shared process-wide render cache by manipulating the u query parameter of the GET /_instatic/hole/<nodeId> server island endpoint.
When was CVE-2026-72587 disclosed?
CVE-2026-72587 was first published in the National Vulnerability Database on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72587 actively exploited?
CVE-2026-72587 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 91.5% of all scored CVEs.
What is the CVSS score of CVE-2026-72587?
CVE-2026-72587 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-72587?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72587, 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

Explore the affected products and dependency analysis for CVE-2026-72587

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