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CVE-2026-53942

SSVC: none

Conda Organization Infrastructure: Pwn Request in update workflow allows PR-controlled template rendering with SYNC_TOKEN

Published
2026-10-23
Last modified
2026-10-23
CNA
GitHub_M
NVD status
Awaiting Analysis
CWE
CWE-94

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CVSS v3.1 (listed by NVD)
9.9
CRITICAL
Scored by github.com (not yet scored by NVD)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
CVSS v4.0 (listed by NVD)
—
Not scored
CVSS (listed by CVE.org)
9.9
CRITICAL
Scored by CNA (GitHub_M) · v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
EPSS exploit probability
0.5%
Percentile 38.3%
as of 2026-10-24
CISA KEV
—
Not listed
SSVC (CISA ADP)
none
Automatable: no / Impact: total

Attack conditions and impact

Derived from the CNA (via NVD) CVSS 3.1 vector
NetworkLoginNo interaction Scope change Confidentiality HIntegrity HAvailability L
MetricValueMeaning
Attack vector AVNNetwork
Attack complexity ACLLow (easy)
Privileges required PRLRegular user
User interaction UINNone
Scope SCChanged (affects other components)
Confidentiality CHHigh
Integrity IHHigh
Availability ALLow
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Description

NVD

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

ProviderVersionScoreVector
NVD / [email protected] (Secondary)3.19.9 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
CNA / GitHub_M3.19.9 CRITICALCVSS: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)

VendorProductVersions
condainfrastructure
affected: < 9c0f23857282ff5cf7a6b3ad6bf0dd6f9974be55

Linux distribution status

Red Hat ↗ Fetching

Debian ↗

No record

Ubuntu ↗ Fetching

References (2)