CVE-2026-27706Network attack vector

Internal data disclosure via unchecked favicon fetching

Published Feb 25, 2026 · Updated Feb 25, 2026

SSRF in Plane before 1.2.2 allows remote authenticated users to read internal HTTP responses through the Add Link feature. The favicon-fetching path accepts a user-supplied link target and issues server-side GET requests without blocking internal destinations, then exposes the fetched response body. General workspace access is sufficient; exposed data is limited to reachable internal services and metadata endpoints that accept headerless requests.

CVSS severity7.7
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

SSRF in Plane before 1.2.2 allows remote authenticated users to read internal HTTP responses through the Add Link feature. The favicon-fetching path accepts a user-supplied link target and issues server-side GET requests without blocking internal destinations, then exposes the fetched response body. General workspace access is sufficient; exposed data is limited to reachable internal services and metadata endpoints that accept headerless requests.

The record

CVE
CVE-2026-27706
Published
Feb 25, 2026
Updated
Feb 25, 2026
Vendor
Plane
Product
Plane
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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=< 1.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Plane · Planeversion=< 1.2.2

Published CVSS scores

7.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo