How severe is CVE-2026-103849?

CVE-2026-103849 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-103849 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-103849?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-103849 published?

CVE-2026-103849 was published on 2026-10-13 and last updated on 2026-10-20.

CVE-2026-103849

CVE-2026-103849 is a critical-severity vulnerability with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1336.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1336
Published: 2026-10-13
Last modified: 2026-10-20

Description

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.

Frequently asked questions

What is CVE-2026-103849?: 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.
How severe is CVE-2026-103849?: CVE-2026-103849 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-103849 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-103849?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-103849 published?: CVE-2026-103849 was published on 2026-10-13 and last updated on 2026-10-20.

References

Other CWE-1336 vulnerabilities

CVE-2026-97359 — Critical (CVSS 10.0): HFS2 version 2.4.0 and earlier contains a template injection vulnerability in the multipart upload handler that allows…
CVE-2026-75650 — Critical (CVSS 10.0): Adobe Commerce is affected by an Improper Neutralization of Special Elements Used in a Template Engine vulnerability…
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