---
title: "CVE-2026-103849: Adobe Commerce | Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336)"
url: https://erroneo.us/security/cve/CVE-2026-103849/
description: "CVE-2026-103849 (Adobe Adobe Commerce): Adobe Commerce is affected by an Improper Neutralization of Special Elements Used in a Template Engine vulnerability…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-10-13
date_modified: 2026-10-20
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-103849"
kev: false
cvss: 10
epss: 0.00841
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-103849: Adobe Commerce | Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336)

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.8% , percentile 57: FIRST’s model estimates a 0.8% chance of exploitation activity in the next 30 days, higher than 57% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Editorial verdict: Act now. Magento StyleSmuggler CVE-2026-75650: Exploited Pre-Auth RCE — Any self-run Magento or Adobe Commerce store without the September hotfix should be presumed compromised: patch, then scan, then rotate the encryption key and every credential it protects, and add the October fix for the follow-on BlockStrap bug.

## What it is

Adobe Commerce is affected by an Improper Neutralization of Special Elements Used in a Template Engine vulnerability that could result in arbitrary code execution in the context of the current user, potentially gaining elevated access or control over the victim's account or session. Exploitation of this issue does not require user interaction. Scope is changed.

## Affected products (CVE record)

- Adobe Adobe Commerce: <= 2.4.9-2026-sep, 2.4.8-2026-sep, 2.4.7-2026-sep, 2.4.6-2026-sep, 2.4.5-2026-sep, 2.4.4-2026-sep
- Adobe Adobe Commerce B2B: <= 1.5.3-2026-sep, 1.5.2-2026-sep, 1.4.2-2026-sep, 1.3.4-2026-sep, 1.3.3-2026-sep
- Adobe Magento Open Source: <= 2.4.9-2026-sep, 2.4.8-2026-sep, 2.4.7-2026-sep

## Severity

- adobe CVSS 3.1: 10 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.84% probability of exploitation activity in the next 30 days; percentile 57.

## Sources

- [adobe.com](https://www.adobe.com/trust/security/products/commerce/apsb26-153.html)
- [CVE.org record CVE-2026-103849](https://www.cve.org/CVERecord?id=CVE-2026-103849)
- [NVD entry CVE-2026-103849](https://nvd.nist.gov/vuln/detail/CVE-2026-103849)
- [github.com](https://github.com/dinosn/cve-2026-103849-blockstrap-lab)

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Source page: https://erroneo.us/security/cve/CVE-2026-103849/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt