# CVE-2026-104977: Plane incomplete SSRF fix in work-item link unfurling

Source: https://junglewise.ai/threats/cve-2026-104977-plane-is-an-open-source-project-management-tool-prior-to-1-4-0  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-05. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-104977 · Severity: high · CVSS 7.7 · Published 2026-10-05

Plane is an open-source project management tool. A previous partial fix for a Server-Side Request Forgery (SSRF) vulnerability in work-item link handling was incomplete in v1.3.1, allowing authenticated project members to make the server fetch internal targets such as cloud metadata and read the response. This could expose sensitive credentials and internal service information used in cloud deployments.

Technologies: [Makeplane Plane](https://junglewise.ai/threats/technologies/plane). Vendors: [Makeplane](https://junglewise.ai/threats/vendors/makeplane).

## Quick answers

**Is CVE-2026-104977 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-104977 being exploited in the wild.

**How severe is CVE-2026-104977?** High severity, with a CVSS score of 7.7, published 5 October 2026.

**Which products and versions are affected?** Makeplane Plane before 1.4.0, including 1.3.1 GA.

**Is there a fix for CVE-2026-104977?** Yes: fixed in 1.4.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-104977 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-104977?** Check whether you run Makeplane Plane at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 1.4.0

## Technical details

The SSRF vulnerability exists in work-item link unfurling and related components (webhooks, OAuth avatar fetching). An authenticated attacker can bypass IP validation checks and DNS-rebinding protections to reach internal addresses (including 169.254.169.254 metadata endpoints); responses are exfiltrated via link titles or favicons. The fix requires hardened IP classification, pinned-IP request validation, and proper redirect handling across all affected code paths.

## Affected products

- makeplane Plane before 1.4.0, including 1.3.1 GA

## Timeline

- 2026-10-05: disclosed
- 2026-05-31: patched: Fix merged in PR 9163 on preview branch but not in released 1.3.1 tag

## References

- [https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615](https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615)
- [https://github.com/makeplane/plane/pull/9163](https://github.com/makeplane/plane/pull/9163)

## Related threats

- [makeplane plane rate limit bypass via X-Forwarded-For header](https://junglewise.ai/threats/cve-2026-111869-a-vulnerability-was-identified-in-makeplane-plane-up-to-1-4-2)
- [Plane account takeover via unverified OAuth email](https://junglewise.ai/threats/cve-2026-105640-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane project management asset IDOR in bulk-asset endpoint](https://junglewise.ai/threats/cve-2026-105637-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane privilege escalation in project member role updates](https://junglewise.ai/threats/cve-2026-105634-plane-is-an-open-source-project-management-tool-prior-to-1-3-0)
- [Plane project management tool asset access control bypass](https://junglewise.ai/threats/cve-2026-105631-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)