CVE-2026-45723

LOWPre-NVD 2.72.7
EchelonGraph scoreLOW confidence

This low-severity CVE scores 2.7 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.0%, top 86% of all CVEs by exploit prediction. 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: cna:github_m, epss
2.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 2.7Exploit: NoneExposed: 0

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

Omni: Operator can traverse image-factory API paths via unsanitized talos_version in CreateSchematic

Summary

managementServer.CreateSchematic (internal/backend/grpc/schematics.go) passes the caller-controlled TalosVersion field directly to imageFactoryClient.OverlaysVersions, which embeds it verbatim into a fmt.Sprintf("/version/%s/overlays/official", talosVersion) path template. url.URL.JoinPath resolves any ../ sequences in that path, allowing an authenticated Operator to rewrite the URL path and force Omni to issue HTTP GET requests to unintended paths on the configured image-factory server. Error body content from those unintended endpoints is returned to the caller.

Severity

  • Attack Vector: Network: exploited via the gRPC CreateSchematic API endpoint.
  • Attack Complexity: Low: once the attacker holds an Operator credential and has identified a media ID with an overlay, exploitation is a single API call.
  • Privileges Required: High: role.Operator is required, which has administrative capabilities on Omni.
  • User Interaction: None.
  • Scope: Unchanged: the traversal is constrained to the configured image-factory host; the attacker cannot redirect Omni to an arbitrary external server.
  • Confidentiality Impact: Low: error body content from unintended image-factory endpoints is reflected back to the operator, potentially leaking server-internal information.
  • Integrity Impact: None: only HTTP GET requests are issued; no write operations are performed.
  • Availability Impact: None.

Impact

  • Same-host path traversal: An authenticated Operator can force Omni to issue GET requests to arbitrary URL paths on the configured image-factory server, bypassing the intended versioned overlay API structure.
  • Error-body disclosure: HTTP error responses from unintended image-factory endpoints are reflected back to the operator, potentially leaking server-internal diagnostics or sensitive path content.
  • Internal network probing: In deployments using a private image-factory instance on an internal network, the attacker can probe endpoint existence and partial responses through error-text differences.
  • Depth control: By varying the number of ../ prefixes in talosVersion, the attacker can reach any path hierarchy on the image-factory host.

Credit

This vulnerability was discovered and reported by bugbunny.ai.

CVSS v3
2.7
EG Score
2.7(low)
EPSS
13.7%
KEV
Not listed

Published

June 5, 2026

Last Modified

June 5, 2026

Vendor Advisories for CVE-2026-45723(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)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/siderolabs/omni—1.7.3—

Data Freshness Timeline

(refreshed 2× in last 7d / 11× 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. 2026-07-03 20:27 UTCEG score recompute
  2. 2026-06-30 18:11 UTCEG score recompute
  3. 2026-06-27 10:47 UTCEG score recompute
  4. 2026-06-24 08:29 UTCEG score recompute
  5. 2026-06-21 05:21 UTCEG score recompute
  6. 2026-06-18 01:07 UTCEG score recompute
  7. 2026-06-14 23:18 UTCEPSS rescore
  8. 2026-06-14 22:45 UTCEG score recompute
  9. 2026-06-12 23:12 UTCEPSS rescore
  10. 2026-06-11 20:29 UTCEG score recompute
  11. 2026-06-08 18:13 UTCEG score recompute
  12. 2026-06-05 15:57 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-45723?
CVE-2026-45723 is a low vulnerability published on June 5, 2026. Omni: Operator can traverse image-factory API paths via unsanitized talos_version in CreateSchematic Summary managementServer.CreateSchematic (internal/backend/grpc/schematics.go) passes the caller-controlled TalosVersion field directly to imageFactoryClient.OverlaysVersions, which embeds it…
When was CVE-2026-45723 disclosed?
CVE-2026-45723 was first published in the National Vulnerability Database on June 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45723 actively exploited?
CVE-2026-45723 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45723?
CVE-2026-45723 has a CVSS v4.0 base score of 2.7 (CNA self-assessment; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-45723?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45723, 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.

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