CVE-2026-41264

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.4%, top 29% 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, nvd
Weaponized
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Metasploit, ssvc poc, public exploit)
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS: 9.8Exploit: Metasploit · ssvc poc · public exploitExposed services: Not assessed

A fix is available — apply it.

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, the specific flaw exists within the run method of the CSV_Agents class. The issue results from the lack of proper sandboxing when evaluating an LLM generated python script. An attacker can leverage this vulnerability to execute code in the context of the user running the server. Using prompt injection techniques, an unauthenticated attacker with the ability to send prompts to a chatflow using the CSV Agent node may convince an LLM to respond with a malicious python script that executes attacker controlled commands on the Flowise server. This vulnerability is fixed in 3.1.0.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
70
EG Risk 70/100

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
Severity98% × 45%
Exploitation65% × 40%
Automatability0% × 15%
EPSS PROB
1.2%
EPSS %ILE
66th
KEV
Not listed

Published

April 23, 2026

Last Modified

April 24, 2026

Advisory Details (1)

Auto-updated Oct 8, 2026
🔬 Proof of concept available. Patch available. Sources: github.
githubMentions a patch (unverified)🟡 PoC Available

CSV Agent Prompt Injection Remote Code Execution Vulnerability · Advisory · FlowiseAI/Flowise · GitHub

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-3hjv-c53m-58jj

Affected Packages

(2 across 1 ecosystem)
npm(2)
PackageVulnerable rangeFix by version rangeDependents
flowise—
  • every version up to 3.1.0: fixed in 3.1.0
—
flowise-components—
  • every version up to 3.1.0: fixed in 3.1.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 22× 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.

Showing the most recent 100 of 167 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
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  13. 2026-09-23 08:53 UTCOSV refresh
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  1. 2026-09-04 05:06 UTCEPSS rescore
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  25. 2026-08-12 17:57 UTCEG score recompute
  26. 2026-08-12 13:51 UTCEPSS rescore
  27. 2026-08-11 16:43 UTCEG score recompute
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  31. 2026-08-09 16:25 UTCEG score recompute
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  37. 2026-08-06 13:46 UTCEPSS rescore
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  42. 2026-08-03 21:09 UTCEG score recompute
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  45. 2026-08-02 02:27 UTCEPSS rescore
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  47. 2026-07-30 16:28 UTCEPSS rescore
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  50. 2026-07-27 14:13 UTCEPSS rescore
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  56. 2026-07-23 03:11 UTCEG score recompute
  57. 2026-07-22 14:08 UTCEPSS rescore
  58. 2026-07-21 15:24 UTCEPSS rescore
  59. 2026-07-20 23:02 UTCOSV refresh
  60. 2026-07-20 17:08 UTCEPSS rescore
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  73. 2026-07-09 19:10 UTCEPSS rescore
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  75. 2026-07-07 13:46 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitexploit/multi/http/flowise_auth_rce_cve_2026_41264✓ verified
    First seen Apr 22, 2026

    Flowise CSV Agent Prompt Injection RCE

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-41264?
CVE-2026-41264 is a critical vulnerability published on April 23, 2026. Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, the specific flaw exists within the run method of the CSV_Agents class. The issue results from the lack of proper sandboxing when evaluating an LLM generated python script. An attacker can…
When was CVE-2026-41264 disclosed?
CVE-2026-41264 was first published on April 23, 2026, with the most recent update on April 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41264 actively exploited?
CVE-2026-41264 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model classifies it as weaponized: a functional public exploit exists. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (66th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-41264?
CVE-2026-41264 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-41264?
A fix for CVE-2026-41264 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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