CVE-2026-33475Public exploitNetwork attack vector

CI command execution via untrusted workflow interpolation

Published Mar 24, 2026 · Updated Mar 24, 2026

Shell injection in Langflow OSS before 1.9.0 allows remote attackers to execute commands in GitHub Actions via a malicious pull request. Multiple repository workflows interpolate attacker-controlled branch names, pull request titles, and action inputs directly into shell run steps without neutralizing shell metacharacters. Exploitation requires a public fork with GitHub Actions enabled and grants access to runner secrets and release or image publishing operations available to the workflow.

CVSS severity9.1
Critical
EPSS probability2.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Shell injection in Langflow OSS before 1.9.0 allows remote attackers to execute commands in GitHub Actions via a malicious pull request. Multiple repository workflows interpolate attacker-controlled branch names, pull request titles, and action inputs directly into shell run steps without neutralizing shell metacharacters. Exploitation requires a public fork with GitHub Actions enabled and grants access to runner secrets and release or image publishing operations available to the workflow.

The record

CVE
CVE-2026-33475
Published
Mar 24, 2026
Updated
Mar 24, 2026
Vendor
OpenBMC Project
Product
Langflow OSS
Classifications
CWE-78, CWE-74, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenBMC Project · Langflow OSSversion=< 1.9.0

Published CVSS scores

9.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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