Security readout for executives and security teams
Plain-English summary
CVE-2026-27635 affects Manyfold, a self-hosted 3D model management application. Before version 0.133.0, an authenticated user could trigger remote code execution when model render generation is enabled by uploading a ZIP with a specially crafted filename. This is high priority for organizations exposing Manyfold to untrusted users or broad internal user groups.
Executive priority
Treat as a high-priority application update where Manyfold is used with uploads enabled. The business risk is authenticated remote code execution, potentially compromising the host and stored model data. Prioritize internet-facing or partner-accessible deployments first.
Technical view
Manyfold versions before 0.133.0 are vulnerable to OS command injection (CWE-78). The reported flaw occurs when a ZIP-uploaded filename containing shell metacharacters reaches a Ruby backtick call unsanitized during f3d render generation. CVSS is 7.5 high: network reachable, low privileges required, high attack complexity, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to Manyfold deployments below 0.133.0 where model render generation is enabled and users can log in and upload ZIP model archives. Risk is higher if accounts are easy to obtain, shared broadly, or available to semi-trusted external collaborators.
Exploitation context
The source bundle does not indicate active exploitation, and this CVE is not listed as KEV. Exploitation requires a logged-in user and the vulnerable render-generation path. Successful exploitation could execute operating system commands in the context of the Manyfold application environment.
Researcher notes
Key conditions are authenticated access, ZIP upload capability, render generation enabled, and Manyfold before 0.133.0. The vulnerable data flow is filename handling into a Ruby backtick call. Public sources identify the fix version but do not provide evidence of active exploitation.
Mitigation direction
- Upgrade Manyfold to version 0.133.0 or later.
- Review the GitHub advisory and release notes for vendor-specific guidance.
- If upgrade is delayed, assess disabling model render generation per vendor guidance.
- Restrict Manyfold accounts and upload permissions to trusted users only.
Validation and detection
- Identify all Manyfold instances and record deployed versions.
- Confirm whether any instance runs a version earlier than 0.133.0.
- Check whether model render generation is enabled.
- Review who can log in and upload ZIP model archives.
- Confirm remediation by verifying Manyfold reports version 0.133.0 or later.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-27635 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H1.65.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/manyfold3d/manyfold/security/advisories/GHSA-p589-cf26-v7h2CVE reference · x_refsource_CONFIRM
- https://github.com/manyfold3d/manyfold/releases/tag/v0.133.0CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.