CVE-2026-0685Network attack vector

Remote code execution via built-in namespace fallback

Published Jun 26, 2026 · Updated Jun 26, 2026

Template injection in Edgewall Software Genshi 0.7.9 and earlier allows remote attackers to execute arbitrary code via crafted expressions. The eval.py evaluator passes compiled expressions to Python eval() or exec(), while lookupname() resolves missing variables from the built-in namespace. Exploitation requires influence over template expressions, and injected code runs with the hosting application's privileges.

CVSS severity9.8
Critical
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Template injection in Edgewall Software Genshi 0.7.9 and earlier allows remote attackers to execute arbitrary code via crafted expressions. The eval.py evaluator passes compiled expressions to Python eval() or exec(), while lookupname() resolves missing variables from the built-in namespace. Exploitation requires influence over template expressions, and injected code runs with the hosting application's privileges.

The record

CVE
CVE-2026-0685
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
Edgewall Software
Product
Genshi
Classifications
CWE-94, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=0.7.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Edgewall Software · Genshiversion=0 <=0.7.9

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.006Python

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo