CVE-2026-30242: Plane Plane Has SSRF Vulnerability

HIGH
Advisory Identifier: GHSA-fpx8-73gf-7x73
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CVSS 8.5
CWE-918
Published
Advisory Summary

CVE-2026-30242 is a HIGH (CVSS 8.5) plane has ssrf vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Plane libraries in the PyPI ecosystem. The issue involves plane has ssrf via incomplete ip validation in webhook url serializer. Remediation is available by upgrading affected packages to version 1.2.3.

CVE-2026-30242 at a Glance

CVE Identifier CVE-2026-30242
GHSA Identifier GHSA-fpx8-73gf-7x73
Severity HIGH
CVSS v3.1 Base Score 8.5
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Plane
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-30242

To remediate this vulnerability, upgrade all affected Plane dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

plane fixed: 1.2.3 
pip install plane>=1.2.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show plane

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-30242, inspect your installed packages using pip:

pip show plane

Analyze the terminal output to locate any version of Plane in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.2.3), your application is affected.

Note: The pip show plane command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Plane, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary The webhook URL validation in `plane/app/serializers/webhook.py` only checks `ip.is_loopback`, allowing attackers with workspace ADMIN role to create webhooks pointing to private/internal network addresses (`10.x.x.x`, `172.16.x.x`, `192.168.x.x`, `169.254.169.254`, etc.). When webhook events fire, the server makes requests to these internal addresses and stores the response — enabling SSRF with full response read-back. ### Impact - **Cloud metadata exfiltration**: Access AWS/GCP/Azure instance metadata (IAM credentials, tokens) - **Internal service scanning**: Probe internal network services not exposed to the internet - **Data exfiltration via response logs**: Full response body from internal services is stored and returned to the attacker through the webhook logs API - Bypass vectors: `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`, `169.254.0.0/16`, `0.0.0.0`, `::ffff:` mapped addresses

CVE-2026-30242 Affected Plane Versions

1 component(s)
Fixed Versions:
1.2.3
Product / Package Ecosystem Affected Versions Fixed Version
plane
pypi/plane
PyPI
< 1.2.3
1.2.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/makeplane/plane/security/advisories/GHSA-fpx8-73gf-7x73
NVD — CVE-2026-30242 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-30242
Plane Source Repository REPOSITORY
https://github.com/makeplane/plane
Plane Release RELEASE
https://github.com/makeplane/plane/releases/tag/v1.2.3

Frequently Asked Questions

What is CVE-2026-30242?
CVE-2026-30242 is a security vulnerability in Plane involving Plane has SSRF via Incomplete IP Validation in Webhook URL Serializer under CWE-918: Server-Side Request Forgery (SSRF).
Which Plane versions are affected?
Affected versions include releases prior to 1.2.3 across affected packages: plane.
What version fixes CVE-2026-30242?
Upgrading to 1.2.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is plane affected?
Yes, plane is affected in releases prior to 1.2.3. Upgrade your dependency to 1.2.3 or later.
What is the CVSS score of CVE-2026-30242?
CVE-2026-30242 has a CVSS v3.1 base score of 8.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.
What CWE is associated with CVE-2026-30242?
CVE-2026-30242 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check PyPI dependencies for CVE-2026-30242?
Run the dependency tree command: 'pip show plane'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-fpx8-73gf-7x73",
  "modified" : "2026-03-09T13:12:11Z",
  "published" : "2026-03-05T21:43:15Z",
  "aliases" : [ "CVE-2026-30242" ],
  "summary" : "Plane has SSRF via Incomplete IP Validation in Webhook URL Serializer",
  "details" : "### Summary\nThe webhook URL validation in `plane/app/serializers/webhook.py` only checks `ip.is_loopback`, allowing attackers with workspace ADMIN role to create webhooks pointing to private/internal network addresses (`10.x.x.x`, `172.16.x.x`, `192.168.x.x`, `169.254.169.254`, etc.). When webhook events fire, the server makes requests to these internal addresses and stores the response — enabling SSRF with full response read-back.\n\n### Impact\n- **Cloud metadata exfiltration**: Access AWS/GCP/Azure instance metadata (IAM credentials, tokens)\n- **Internal service scanning**: Probe internal network services not exposed to the internet\n- **Data exfiltration via response logs**: Full response body from internal services is stored and returned to the attacker through the webhook logs API\n- Bypass vectors: `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`, `169.254.0.0/16`, `0.0.0.0`, `::ffff:` mapped addresses",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "plane"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.2.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.2.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/makeplane/plane/security/advisories/GHSA-fpx8-73gf-7x73"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-30242"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/makeplane/plane"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/makeplane/plane/releases/tag/v1.2.3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-05T21:43:15Z",
    "nvd_published_at" : "2026-03-06T22:16:01Z"
  }
}