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CVE-2026-39843

⚠ī¸ high
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Summary

Plane is an an open-source project management tool. From 0.28.0 to before 1.3.0, the remediation of GHSA-jcc6-f9v6-f7jw is incomplete which could lead to the same full read Server-Side Request Forgery when a normal html page contains a link tag with an href that redirects to a private IP address is supplied to Add link by an authenticated attacker with low privileges. Redirects for the main page URL are validated, but not the favicon fetch path. fetch_and_encode_favicon() still uses requests.get

Description

Plane is an an open-source project management tool. From 0.28.0 to before 1.3.0, the remediation of GHSA-jcc6-f9v6-f7jw is incomplete which could lead to the same full read Server-Side Request Forgery when a normal html page contains a link tag with an href that redirects to a private IP address is supplied to Add link by an authenticated attacker with low privileges. Redirects for the main page URL are validated, but not the favicon fetch path. fetch_and_encode_favicon() still uses requests.get(favicon_url, ...) with the default redirect-following. This vulnerability is fixed in 1.3.0.

CVSS Score
7.7
High
EPSS Score
0.0
Exploit Probability
Published Date
2026-04-09
First Seen: 2026-04-10
📊 Relative Risk Intelligence

This CVE is Moderate Risk - more severe than 69.6% of all 329,778 vulnerabilities in our database.

#100,297
Above average severity
Severity Percentile
đŸŽ¯ CISA SSVC Assessment Updated: Apr 13, 2026
🔍 Exploitation Status
Poc
Proof-of-concept available
⚙ī¸ Automatable
NO
Requires human interaction
đŸ’Ĩ Technical Impact
Partial
Limited system impact
SSVC data provided by CISA
Last Modified 2026-04-17
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CWE IDs (Weakness Types)
CWE-918

đŸ“Ļ Affected Products 1

Vendor Product Status Affected Versions
plane plane Affected
> 0.28.0 < 1.3.0

🔗 References 1

https://github.com/makeplane/plane/security/advisori...
Exploit Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-10850 đŸ”ļ medium 5.4 0.2 Plane CE 1.3.1 allows a low-privileged project member to submit arbitrary HTML/JS in the description_html field when cre... 2026-06-17
CVE-2026-46558 ⚠ī¸ high 8.3 0.2 Plane is an open-source project management tool. Prior to version 1.3.1, there is a cross-workspace asset authorization ... 2026-06-10
CVE-2026-40102 đŸ”ļ medium 6.5 0.0 Plane is an open-source project management tool. In versions 1.3.0 and below, SavedAnalyticEndpoint passes the user-cont... 2026-05-20
CVE-2026-27949 ℹī¸ low 2.0 0.0 Plane is an an open-source project management tool. Prior to 1.3.0, a vulnerability was identified in Plane's authentica... 2026-04-07
CVE-2026-30242 ⚠ī¸ high 8.5 0.0 Plane is an an open-source project management tool. Prior to version 1.2.3, the webhook URL validation in plane/app/seri... 2026-03-06
CVE-2026-30244 ⚠ī¸ high 7.5 0.0 Plane is an an open-source project management tool. Prior to version 1.2.2, unauthenticated attackers can enumerate work... 2026-03-06
These CVEs affect the same products