CVE catalog
CVE-2026-79310
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
- Severity
- High · CVSS 8.5
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.67% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | webpy | sid | 1:0.76-1 | vulnerable |
| Debian | webpy | forky | 1:0.76-1 | vulnerable |
| Debian | webpy | trixie | 1:0.62-6 | vulnerable |
| Debian | webpy | bookworm | 1:0.62-4+deb12u1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | webpy | source | sid | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | webpy | source | forky | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | webpy | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | webpy | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
Notes
[trixie] webpy: Minor issue [bookworm] webpy: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-webpy]Affected
Source package: [webpy]
Details (2)
1:0.62-4+deb12u1· all · bookwormAffected
nvd · webpy · debian · bookworm; nvd · webpy · debian · 12
1:0.62-4+deb12u1· all · bookwormAffected
nvd · webpy · debian · bookworm; nvd · webpy · debian · 12
- [python-webpy-doc]Affected
Source package: [webpy]
Details (2)
1:0.62-4+deb12u1· all · bookwormAffected
nvd · webpy · debian · bookworm; nvd · webpy · debian · 12
1:0.62-4+deb12u1· all · bookwormAffected
nvd · webpy · debian · bookworm; nvd · webpy · debian · 12
[Debian 13 (Trixie)]
- [python3-webpy]Affected
Source package: [webpy]
Details (2)
1:0.62-6· all · trixieAffected
nvd · webpy · debian · 13
1:0.62-6· all · trixieAffected
nvd · webpy · debian · 13
- [python-webpy-doc]Affected
Source package: [webpy]
Details (2)
1:0.62-6· all · trixieAffected
nvd · webpy · debian · 13
1:0.62-6· all · trixieAffected
nvd · webpy · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-79310]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-79310]
- [https://security-tracker.debian.org/tracker/CVE-2026-79310]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79310.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]