CVE-2025-65200
CVE-2025-65200
- Critical
- CVSS 9.6
- EPSS 0.35%
- No fixed version listed
Summary
An issue was discovered in localstack 4.9.2 allowing attackers to execute arbitrary code via crafted content hosted on a web-accessable URL and when passed said URL in the the templateURL to the _localstack/cloudformation/deploy endpoint, the hosted content can get executed in the context of the docker container.
From the CVE record.
What to do
No fixed version listed
Affected products
| Product | Affected | Fixed in |
|---|---|---|
| n/a n/a | n/a | None listed |
Scores and signals
- Exploitation
- No known exploitation
- Severity
- Critical, CVSS 9.6 (v3.1, scored by CISA-ADP)
- EPSS
- 0.35% chance of exploitation in the next 30 days (EPSS from FIRST, as of Oct 28, 2026)
- CISA's SSVC decision points
- Exploitation: proof of concept. Automatable: no. Technical impact: total. As of Oct 29, 2026.
- Weakness
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Timeline
- First listed as critical by cve.now. Affected and fixed versions come from the CVE record, once one is published.