Frappe ERPNext up to 15.103.1 Template Expression special elements used in a template engine

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Frappe ERPNext up to 15.103.1 and classified as critical. This affects an unknown function of the component Template Expression Handler. Executing a manipulation can lead to improper neutralization of special elements used in a template engine. The identification of this vulnerability is CVE-2026-38431. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Frappe ERPNext up to 15.103.1. It has been declared as critical. This vulnerability affects an unknown code of the component Template Expression Handler. The manipulation with an unknown input leads to a improper neutralization of special elements used in a template engine vulnerability. The CWE definition for the vulnerability is CWE-1336. The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

ERPNext v15.103.1 and before is vulnerable to Server-Side Template Injection (SSTI). An attacker with permission to create or edit email templates can inject template expressions that are executed on the server when the template is rendered.

The advisory is shared for download at c0wking.hashnode.dev. This vulnerability was named CVE-2026-38431 since 04/06/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/05/2026). The MITRE ATT&CK project declares the attack technique as T1221.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper neutralization of special elements used in a template engine
CWE: CWE-1336 / CWE-791 / CWE-790
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/06/2026 CVE reserved
05/05/2026 +29 days Advisory disclosed
05/05/2026 +0 days VulDB entry created
05/05/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: c0wking.hashnode.dev
Status: Not defined

CVE: CVE-2026-38431 (🔒)
GCVE (CVE): GCVE-0-2026-38431
GCVE (VulDB): GCVE-100-361204

Entryinfo

Created: 05/05/2026 19:11
Changes: 05/05/2026 19:11 (52)
Complete: 🔍
Cache ID: 216::103

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