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01 Record

CVE-2026-73299

Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer

CriticalPUBLISHEDCNA: GitHub_M
CNA base score10.0 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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02 Description

Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
1.78% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 77.8% of scored records. A rank, not a probability.
NVD base score
10.0 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD analysis status
Deferred. NVD last modified this record on 2026-10-24.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-08-12 17:31Z2 MO AGO
Last updated
2026-08-12 18:54Z2 MO AGO
Reserved
2026-08-11
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Critical (CVSS 10.0)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weaknesses
  • CWE-94Improper Control of Generation of Code ('Code Injection')Base
  • CWE-1336Improper Neutralization of Special Elements Used in a Template EngineBase
Data version
5.2
Document digest
013760600004737e5dd2d68e7ed90a8c4942848d4e23f5fb03ce8814346efb23

05 Affected products

VendorProductVersionsPlatforms
microsoftprompty< 0.1.5, >= 2.0.0-alpha.1, < 2.0.0-beta.5—

06 References