CVE-2026-54757Public exploit

Command execution via untrusted template re-parsing

Published Aug 25, 2026 · Updated Aug 25, 2026

Server-side template injection in OSCAL Compass Compliance-trestle before 3.12.4 and 4.0.0 through 4.0.3 allows attackers to run OS commands. MDCleanInclude.parse and MDSectionInclude.parse pass untrusted Markdown text to Jinja2 Parser.parse as template source in a non-sandboxed environment, permitting Python object traversal. Exploitation requires a user or automated pipeline to render attacker-controlled Markdown, SSP, or YAML content, and commands run with the Trestle process privileges.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in OSCAL Compass Compliance-trestle before 3.12.4 and 4.0.0 through 4.0.3 allows attackers to run OS commands. MDCleanInclude.parse and MDSectionInclude.parse pass untrusted Markdown text to Jinja2 Parser.parse as template source in a non-sandboxed environment, permitting Python object traversal. Exploitation requires a user or automated pipeline to render attacker-controlled Markdown, SSP, or YAML content, and commands run with the Trestle process privileges.

The record

CVE
CVE-2026-54757
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
OSCAL Compass
Product
Compliance-trestle
Classifications
CWE-94, T1059, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 3.12.4
  2. Affected versionversion=>= 4.0.0, < 4.1.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

OSCAL Compass · Compliance-trestleversion=< 3.12.4; version=>= 4.0.0, < 4.1.0

Published CVSS scores

7.8GitHub CNACVSS:3.1/AV:L/AC:L/PR:N/UI:R/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.

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No observations available

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

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059Command and Scripting Interpreter
T1204.002Malicious File

Public exploit references

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

Technologies

Your stack

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Your stack

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