TI-2026-37895 Aliases CVE-2026-52780

OpenProject: Cache store poisoning leads to Remote Code Execution (RCE)

MEDIUM 43CWE-20Published 2026-06-26 · Updated 2026-06-27

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, cache store poisoning leads to Remote Code Execution (RCE). This vulnerability is fixed in 17.3.3 and 17.4.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0039 33rd percentileScored 2026-11-07

Fix Fixed openproject (opf): 17.3.3, 17.4.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
opf	openproject	before 17.3.3; 17.4.0 to before 17.4.1	17.3.3, 17.4.1	Patch available	CNA

openproject Vendoropf Affected before 17.3.3; 17.4.0 to before 17.4.1 Fixed in 17.3.3, 17.4.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:openproject:openproject::::::::	—	—	opf

cpe:2.3:a:openproject:openproject:*:*:*:*:*:*:*:* Versions — — ·opf

Remediation

Fix · CNA openproject (opf) Fixed in 17.3.3, 17.4.1

Timeline

2026-10-02 Threatist record created from CVE-2026-52780

References

Other 1

https://github.com/opf/openproject/security/advisories/GHSA-qj96-f42f-6336

TI-2019-08673 A SQL injection vulnerability in the activities API in OpenProject before 8.3.2 allows a… CVSS 3.0HIGH 8.1
TI-2026-34781 OpenProject: Journal diff endpoint bypasses object, journal, and field visibility checks CVSS 3.1HIGH 7.5
TI-2026-26047 OpenProject: 2FA OTP Verification Missing Rate Limiting CVSS 3.1HIGH 7.4
TI-2026-29552 OpenProject has Cross-Project Meeting Agenda Item Injection via Unscoped Section Lookup CVSS 3.1HIGH 7.1
TI-2026-32623 OpenProject: Relations API Filter Bypasses Visibility Scope, Leaking Cross-Project Work Package Subjects CVSS 3.1MEDIUM 6.5
TI-2023-14850 OpenProject user sessions not terminated after activation of 2FA CVSS 3.1MEDIUM 6.5

See all 57 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences