A vulnerability was found in the internal Access Control List (ACL) subsystem of kronosnet (Version affected: <= 1.34). When the framework is explicitly configured to manage dynamic links (accepting network traffic from any IP address) without network payload encryption, the validation architecture implicitly trusts the link ID provided within incoming data packets. A remote, unauthenticated attacker can exploit this lack of validation by spoofing a legitimate link ID inside crafted network frames. This allows the attacker to fully bypass the ACL framework and inject arbitrary data packets into the application layer, potentially leading to data corruption or service instabilities.
CVE-2026-15812
MEDIUMPre-NVD 4.84.8—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 4.8 from GitHub Security Advisory published 2026-07-21. a secondary CVSS source baseline 4.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.8
- EG Score
- 4.8(high)
- EG Risk
- 22(Track)EG Risk 22/100SSVC: 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 computedSeverity48% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS
- 6.1%
- KEV
- Not listed
Published
July 21, 2026
Last Modified
July 22, 2026
Advisory Details (2)
Auto-updated Jul 21, 2026Patch available. Sources: redhat.
redhat Patch Available
2500851 – (CVE-2026-15812) CVE-2026-15812 kronosnet: kronosnet: access control list bypass via link ID spoofing on unencrypted dynamic links
https://bugzilla.redhat.com/show_bug.cgi?id=2500851Vendor Advisories for CVE-2026-15812(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 10× in last 7d / 10× 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.
- 2026-07-23 14:18 UTCEPSS rescore
- 2026-07-23 03:05 UTCEG score recompute
- 2026-07-22 23:23 UTCEG score recompute
- 2026-07-22 23:23 UTCGHSA enrichment
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-21 15:24 UTCEPSS rescore
- 2026-07-21 06:49 UTCEG score recompute
- 2026-07-21 06:49 UTCGHSA enrichment
- 2026-07-21 05:44 UTCEG score recompute
- 2026-07-21 05:43 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-290
Frequently asked(5)
What is CVE-2026-15812?
CVE-2026-15812 is a medium vulnerability published on July 21, 2026. A vulnerability was found in the internal Access Control List (ACL) subsystem of kronosnet (Version affected: <= 1.34). When the framework is explicitly configured to manage dynamic links (accepting network traffic from any IP address) without network payload encryption, the validation architecture…
When was CVE-2026-15812 disclosed?
CVE-2026-15812 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15812 actively exploited?
CVE-2026-15812 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-15812?
CVE-2026-15812 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-15812?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15812, 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-2026-15812
Is Your Infrastructure Affected by CVE-2026-15812?
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