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CVE-2026-89066

OS command injection in the task synthesis component in projen

HIGH
7.8
CVSS Score
Published: September 11, 2026 at 04:05 PM UTC
Updated: September 11, 2026 at 06:40 PM UTC
1 product affected across 1 vendorProjen

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

Improper neutralization of special elements used in an OS command in the task synthesis component in projen before 0.103.0 might allow context-dependent attackers to execute arbitrary commands on a developer workstation or continuous integration runner via shell metacharacters in project configuration values and repository file names that are interpolated into generated task definitions. To remediate this issue, users should upgrade to version 0.103.0 and then re-synthesize the project so that .projen/tasks.json is regenerated with the corrected task definitions. Upgrading alone is not sufficient because the generated task definition file is committed to the repository.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Projen· AWS
60%
v < 0.103.0
Affected range stops below 0.103.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Patch
Source: cverecord
https://github.com/projen/projen/releases/tag/v0.103.0
Vendor Advisory
Source: cverecord
https://aws.amazon.com/security/security-bulletins/2026-108-aws/
Third Party Advisory
Source: cverecord
https://github.com/projen/projen/security/advisories/GHSA-q6g4-h6vc-vqm8

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHAMZN
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-78CWE-88

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