CVE-2026-54134

HIGHPre-NVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 88% 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: epss, secondary
7.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.0Exploit: None knownExposed: 0

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

OctoPrint provides a web interface for controlling consumer 3D printers. Prior to 1.11.8 and 2.0.0rc3, OctoPrint's custom Tornado upload handler and Flask with Werkzeug parse request parameters differently, allowing an attacker with FILE_UPLOAD permission to inject reserved internal upload fields through query parameters or parser differentials despite the earlier GHSA-m9jh-jf9h-x3h2 fix. The affected endpoints are /api/files/{local|sdcard}, /api/languages, /plugin/backup/restore, and /plugin/pluginmanager/upload_file. An attacker can make OctoPrint treat an arbitrary host file as a temporary upload, move it into a downloadable upload directory, disclose configuration secrets or other readable files, and remove runtime files in a way that can affect a later restart. This issue is fixed in versions 1.11.8 and 2.0.0rc3.

CVSS v3
7.0
EG Score
7.0(medium)
EG Risk
47(Track)
EG Risk 47/100SSVC: 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
Severity70% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

June 23, 2026

Last Modified

August 26, 2026

Advisory Details (5)

Auto-updated Aug 21, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

2.0.0rc3

Patch available: OctoPrint/OctoPrint 2.0.0rc3 (pre-release)

https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc3
github_release Patch Available

1.11.8

Patch available: OctoPrint/OctoPrint 1.11.8

https://github.com/OctoPrint/OctoPrint/releases/tag/1.11.8
github_commit

commit 8e3348197db8 (OctoPrint/OctoPrint)

Fix landed in OctoPrint/OctoPrint commit 8e3348197db8 — awaiting tagged release

https://github.com/OctoPrint/OctoPrint/commit/8e3348197db867c30a32d13984f0bd0d664be413
github_commit

commit 579148beeb6d (OctoPrint/OctoPrint)

Fix landed in OctoPrint/OctoPrint commit 579148beeb6d — awaiting tagged release

https://github.com/OctoPrint/OctoPrint/commit/579148beeb6d6e9b3d41b1cf32309b47218ed380
github Patch Available

File exfiltration possible via further parameter injection on upload endpoints · Advisory · OctoPrint/OctoPrint · GitHub

Affected: version 1.11.8 and 2.0.0rc3.

https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-j4h9-pm27-4rfw

Vendor Advisories for CVE-2026-54134(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)
PyPI(1)
PackageVulnerable rangeFixed inDependents
octoprint1.10.0 ... 2.0.0rc2 (84 versions)2.0.0rc3—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 32× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 10:23 UTCEG score recompute
  3. 2026-09-17 19:31 UTCEPSS rescore
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-14 02:05 UTCEG score recompute
  7. 2026-09-13 16:47 UTCEPSS rescore
  8. 2026-09-13 12:21 UTCEG score recompute
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-10 09:35 UTCEPSS rescore
  11. 2026-09-08 22:01 UTCEPSS rescore
  12. 2026-09-07 16:01 UTCEPSS rescore
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-04 05:06 UTCEPSS rescore
  15. 2026-09-02 14:12 UTCEPSS rescore
  16. 2026-09-01 13:54 UTCEPSS rescore
  17. 2026-09-01 04:40 UTCEPSS rescore
  18. 2026-08-30 20:25 UTCEG score recompute
  19. 2026-08-30 19:17 UTCEPSS rescore
  20. 2026-08-30 01:22 UTCEPSS rescore
  21. 2026-08-28 21:41 UTCEPSS rescore
  22. 2026-08-27 14:25 UTCEPSS rescore
  23. 2026-08-26 18:25 UTCEG score recompute
  24. 2026-08-26 18:11 UTCEG score recompute
  25. 2026-08-26 14:46 UTCEPSS rescore
Show 11 more
  1. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-24 22:05 UTCEG score recompute
  3. 2026-08-23 03:21 UTCEG score recompute
  4. 2026-08-23 00:19 UTCEPSS rescore
  5. 2026-08-21 19:24 UTCEG score recompute
  6. 2026-08-21 18:30 UTCEG score recompute▲ 7.00
  7. 2026-08-21 18:29 UTCMITRE cvelistV5CVSS v3 → 7 · CVSS v4 → 7
  8. 2026-08-01 17:01 UTCEG score recompute
  9. 2026-07-26 15:52 UTCEG score recompute
  10. 2026-07-23 03:19 UTCEG score recompute
  11. 2026-06-23 18:21 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-54134?
CVE-2026-54134 is a high vulnerability published on June 23, 2026. OctoPrint provides a web interface for controlling consumer 3D printers. Prior to 1.11.8 and 2.0.0rc3, OctoPrint's custom Tornado upload handler and Flask with Werkzeug parse request parameters differently, allowing an attacker with FILEUPLOAD permission to inject reserved internal upload fields…
When was CVE-2026-54134 disclosed?
CVE-2026-54134 was first published in the National Vulnerability Database on June 23, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54134 actively exploited?
CVE-2026-54134 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 88.2% of all scored CVEs.
What is the CVSS score of CVE-2026-54134?
CVE-2026-54134 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2026-54134?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54134, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-54134

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