CVE-2026-79310
webpy web.py 0.76 is vulnerable to server-side template injection (SSTI). The template engine can...
webpy web.py 0.76 is vulnerable to server-side template injection (SSTI). The template engine can be tricked into executing attacker-controlled template code that built-in security checks are designed to reject. When an application precompiles templates from a directory the attacker can write to and later renders them through the precompiled template loader, the sandbox is bypassed and the attacker's code runs, resulting in arbitrary Python code execution and OS command execution on the server.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
8.5
webpy web.py 0.76 is vulnerable to server-side template injection (SSTI). The template engine can be tricked into executing attacker-controlled template code that built-in security checks are designed to reject. When an application precompiles templates from a directory the attacker can write to and later renders them through the precompiled template loader, the sandbox is bypassed and the attacker's code runs, resulting in arbitrary Python code execution and OS command execution on the server.
- Record
CVE-2026-79310- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-94
- Updated
- 2026-11-02
EUVDEUVD-2026-85403
8.5
webpy web.py 0.76 is vulnerable to server-side template injection (SSTI). The template engine can be tricked into executing attacker-controlled template code that built-in security checks are designed to reject. When an application precompiles templates from a directory the attacker can write to and later renders them through the precompiled template loader, the sandbox is bypassed and the attacker's code runs, resulting in arbitrary Python code execution and OS command execution on the server.
- Record
EUVD-2026-85403- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-8m9w-mh94-cwr6
8.5
webpy web.py 0.76 is vulnerable to server-side template injection (SSTI). The template engine can...
webpy web.py 0.76 is vulnerable to server-side template injection (SSTI). The template engine can be tricked into executing attacker-controlled template code that built-in security checks are designed to reject. When an application precompiles templates from a directory the attacker can write to and later renders them through the precompiled template loader, the sandbox is bypassed and the attacker's code runs, resulting in arbitrary Python code execution and OS command execution on the server.
- Record
GHSA-8m9w-mh94-cwr6- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-94
- Updated
- 2026-11-02
NVD
8.5
webpy web.py 0.76 is vulnerable to server-side template injection (SSTI). The template engine can be tricked into executing attacker-controlled template code that built-in security checks are designed to reject. When an application precompiles templates from a directory the attacker can write to and later renders them through the precompiled template loader, the sandbox is bypassed and the attacker's code runs, resulting in arbitrary Python code execution and OS command execution on the server.
- Record
CVE-2026-79310- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-94
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-79310
8.5
webpy web.py 0.76 is vulnerable to server-side template injection (SSTI). The template engine can be tricked into executing attacker-controlled template code that built-in security checks are designed to reject. When an application precompiles templates from a directory the attacker can write to and later renders them through the precompiled template loader, the sandbox is bypassed and the attacker's code runs, resulting in arbitrary Python code execution and OS command execution on the server.
- Record
DEBIAN-CVE-2026-79310- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-79310
8.5
webpy web.py 0.76 is vulnerable to server-side template injection (SSTI). The template engine can be tricked into executing attacker-controlled template code that built-in security checks are designed to reject. When an application precompiles templates from a directory the attacker can write to and later renders them through the precompiled template loader, the sandbox is bypassed and the attacker's code runs, resulting in arbitrary Python code execution and OS command execution on the server.
- Record
UBUNTU-CVE-2026-79310- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
webpyDebian:12 |
All versions, plus listed versions 1:0.62-41:0.62-4+deb12u11:0.62-51:0.62-61:0.70-11:0.76-1 |
None known |
webpyDebian:13 |
All versions, plus listed versions 1:0.62-61:0.70-11:0.76-1 |
None known |
webpyDebian:14 |
All versions, plus listed versions 1:0.62-61:0.70-11:0.76-1 |
None known |
webpyUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 1:0.37+20120626-11:0.37+20120626-1ubuntu0.1~esm1 |
None known |
webpyUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 1:0.38-11:0.38+20170615-11:0.38+20170615-1ubuntu0.1~esm1 |
None known |
webpyUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 1:0.39+20181101-11:0.40-21:0.40-2ubuntu0.1~esm1 |
None known |
webpyUbuntu:Pro:22.04:LTS |
All versions, plus listed versions 1:0.61-11:0.61-1ubuntu0.1~esm1 |
None known |
webpyUbuntu:Pro:24.04:LTS |
All versions, plus listed versions 1:0.62-41:0.62-4ubuntu0.1~esm1 |
None known |
webpyUbuntu:26.10 |
All versions, plus listed versions 1:0.62-61:0.70-11:0.76-1 |
None known |
webpyUbuntu:26.04:LTS |
All versions, plus listed versions 1:0.62-6 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-79310 is a high vulnerability (CVSS 8.5) in webpy, published September 23, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.67%, the 52nd percentile. No source names a fixed version.