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PatchSiren cyber security CVE debrief

CVE-2026-79311 webpy CVE debrief

A Cross Site Scripting (XSS) vulnerability exists in webpy web.py version 0.76 via render_jinja.__init__(). This vulnerability allows attackers to inject malicious scripts into web applications built with webpy, potentially leading to unauthorized actions or data breaches. Defenders should assess the impact of this vulnerability on their web applications and prioritize verification of the presence of this vulnerability in their web.py inventory. The CVE record and NVD entry indicate a Cross Site Scripting (XSS) vulnerability exists in webpy web.py version 0.76 via render_jinja.__init__().

Vendor
webpy
Product
web.py
CVSS
MEDIUM 6.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-22
Original CVE updated
2026-10-06
Advisory published
2026-09-22
Advisory updated
2026-10-06

Who should care

Defenders responsible for web applications using webpy web.py version 0.76 should assess exposure to potential XSS attacks and prioritize verification of the presence of this vulnerability in their web.py inventory. They should also review compensating controls for exposed systems while remediation is scheduled and verified.

Why it matters

A Cross Site Scripting (XSS) vulnerability exists in webpy web.py version 0.76 via render_jinja.__init__(). Defenders should prioritize verifying the presence of this vulnerability in their web.py inventory and assess exposure to potential XSS attacks.

  • Defenders should verify the presence of this vulnerability in their web.py inventory
  • Assess exposure to potential XSS attacks
  • Monitor for potential exploitation attempts

Technical summary

The CVE record and NVD entry indicate a Cross Site Scripting (XSS) vulnerability exists in webpy web.py version 0.76 via render_jinja.__init__(). This vulnerability allows attackers to inject malicious scripts into web applications built with webpy, potentially leading to unauthorized actions or data breaches. The vulnerability is confirmed to exist in webpy web.py version 0.76.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their web.py inventory and assess exposure to potential XSS attacks.

Recommended defensive actions

  • Verify the presence of web.py version 0.76 in your inventory
  • Assess exposure to potential XSS attacks
  • Monitor for potential exploitation attempts

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability, with no additional details on exploitation or remediation. The vulnerability is confirmed to exist in webpy web.py version 0.76. Defenders should verify the presence of this vulnerability in their web.py inventory and assess exposure to potential XSS attacks. The source details are limited, and defenders should exercise caution when evaluating the impact of this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-79311 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-79311

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-79311 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-79311

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.