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4 vulnerabilities found for velocity.js by shepherdwind
CVE-2026-73649 (GCVE-0-2026-73649)
Vulnerability from nvd – Published: 2026-08-13 18:05 – Updated: 2026-08-14 16:42
VLAI
EPSS
VEX
Title
Velocity.js: Remote Code Execution via property-read to Function constructor (bypass of CVE-2026-44966 fix)
Summary
Velocity.js is a JavaScript implementation of the Apache Velocity template engine. Prior to 2.1.7, the earlier fix for CVE-2026-44966 filtered constructor, __proto__, and prototype only in the #set assignment handler in src/compile/set.ts, while property-read expressions in src/compile/references.ts remained unfiltered. The getReferences() flow called getAttributes(), whose property access allowed an attacker-controlled template to traverse constructor.constructor to the JavaScript Function constructor. The #set handler validated only the assignment target and did not inspect the right-hand property-read expression, allowing arbitrary shell commands, environment-variable access, cloud-credential access, and internal-network access in the server process. This issue is fixed in version 2.1.7.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:42 UTC
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/shepherdwind/velocity.js/secur… | x_refsource_CONFIRM |
| https://github.com/shepherdwind/velocity.js/pull/192 | x_refsource_MISC |
| https://github.com/shepherdwind/velocity.js/commi… | x_refsource_MISC |
| https://github.com/shepherdwind/velocity.js/relea… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| shepherdwind | velocity.js |
Affected:
< 2.1.7
|
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CVE-2026-44966 (GCVE-0-2026-44966)
Vulnerability from nvd – Published: 2026-05-26 21:21 – Updated: 2026-06-01 17:08
VLAI
EPSS
VEX
Title
Velocity.js: Prototype Pollution in #set path assignment
Summary
Velocity.js is a JavaScript implementation of the Apache Velocity template engine. In 2.1.5 and earlier, a prototype pollution vulnerability was discovered in velocityjs. This issue occurs during the processing of #set directives in Velocity templates. If an application renders a template controlled by an attacker, it is possible to modify Object.prototype, potentially leading to Denial of Service (DoS) or Remote Code Execution (RCE) depending on the server environment.
Severity
8.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-01 17:04 UTC
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/shepherdwind/velocity.js/secur… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| shepherdwind | velocity.js |
Affected:
<= 2.1.5
|
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CVE-2026-73649 (GCVE-0-2026-73649)
Vulnerability from cvelistv5 – Published: 2026-08-13 18:05 – Updated: 2026-08-14 16:42
VLAI
EPSS
VEX
Title
Velocity.js: Remote Code Execution via property-read to Function constructor (bypass of CVE-2026-44966 fix)
Summary
Velocity.js is a JavaScript implementation of the Apache Velocity template engine. Prior to 2.1.7, the earlier fix for CVE-2026-44966 filtered constructor, __proto__, and prototype only in the #set assignment handler in src/compile/set.ts, while property-read expressions in src/compile/references.ts remained unfiltered. The getReferences() flow called getAttributes(), whose property access allowed an attacker-controlled template to traverse constructor.constructor to the JavaScript Function constructor. The #set handler validated only the assignment target and did not inspect the right-hand property-read expression, allowing arbitrary shell commands, environment-variable access, cloud-credential access, and internal-network access in the server process. This issue is fixed in version 2.1.7.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:42 UTC
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/shepherdwind/velocity.js/secur… | x_refsource_CONFIRM |
| https://github.com/shepherdwind/velocity.js/pull/192 | x_refsource_MISC |
| https://github.com/shepherdwind/velocity.js/commi… | x_refsource_MISC |
| https://github.com/shepherdwind/velocity.js/relea… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| shepherdwind | velocity.js |
Affected:
< 2.1.7
|
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CVE-2026-44966 (GCVE-0-2026-44966)
Vulnerability from cvelistv5 – Published: 2026-05-26 21:21 – Updated: 2026-06-01 17:08
VLAI
EPSS
VEX
Title
Velocity.js: Prototype Pollution in #set path assignment
Summary
Velocity.js is a JavaScript implementation of the Apache Velocity template engine. In 2.1.5 and earlier, a prototype pollution vulnerability was discovered in velocityjs. This issue occurs during the processing of #set directives in Velocity templates. If an application renders a template controlled by an attacker, it is possible to modify Object.prototype, potentially leading to Denial of Service (DoS) or Remote Code Execution (RCE) depending on the server environment.
Severity
8.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-01 17:04 UTC
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/shepherdwind/velocity.js/secur… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| shepherdwind | velocity.js |
Affected:
<= 2.1.5
|
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