CVE-2026-53942
SSVC: noneConda Organization Infrastructure: Pwn Request in update workflow allows PR-controlled template rendering with SYNC_TOKEN
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CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Attack conditions and impact
Derived from the CNA (via NVD) CVSS 3.1 vector| Metric | Value | Meaning |
|---|---|---|
| Attack vector AV | N | Network |
| Attack complexity AC | L | Low (easy) |
| Privileges required PR | L | Regular user |
| User interaction UI | N | None |
| Scope S | C | Changed (affects other components) |
| Confidentiality C | H | High |
| Integrity I | H | High |
| Availability A | L | Low |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Description
Conda Organization Infrastructure is a centralized location for infrastructure codes. Prior to commit 9c0f238, a GitHub Actions Pwn Request vulnerability appears to remain present in conda/conda. The affected workflow is .github/workflows/update.yml. It is triggered by issue_comment events containing @conda-bot render or @conda-bot recreate. For the render path, the workflow obtains the pull request head repository and branch from the PR API, checks out that PR-controlled repository/ref using secrets.SYNC_TOKEN, and then runs conda/actions/template-files@7f6830b1428a9bd47f0b068892c77eae95207037. The external template-files action reads its default configuration and templates from the checked-out working directory. In the confirmed finding, that action uses an unsandboxed Jinja2 environment to render attacker-controlled template content. This creates a Pwn Request chain in which an untrusted PR/comment path can reach template rendering in a privileged token context. This issue has been patched via commit 9c0f238.
CVSS assessments
| Provider | Version | Score | Vector |
|---|---|---|---|
| NVD / [email protected] (Secondary) | 3.1 | 9.9 CRITICAL | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L |
| CNA / GitHub_M | 3.1 | 9.9 CRITICAL | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L |
Affected products and packages
CNA (CVE.org)
| Vendor | Product | Versions |
|---|---|---|
| conda | infrastructure | affected: < 9c0f23857282ff5cf7a6b3ad6bf0dd6f9974be55 |
Linux distribution status
References (2)
- https://github.com/conda/infrastructure/commit/9c0f23857282ff5cf7a6b3ad6bf0dd6f9974be55 NVD, CNA x_refsource_MISC
- https://github.com/conda/infrastructure/security/advisories/GHSA-pf87-fcg3-wjfh NVD, CNA x_refsource_CONFIRM