CVE-2026-53942 Conda - Server-Side Template Injection

Conda Organization Infrastructure contains a server-side template injection caused by unsandboxed Jinja2 template rendering in .github/workflows/update.yml, letting attackers execute code via crafted PR comments, exploit requires attacker to control a pull request.

CVSS base score 9.9 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.45% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Server-Side Template Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Published
23 October 2026
Updated
25 October 2026
Weakness
CWE-94

Vendor fix

Update to the version including commit 9c0f238 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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