How severe is CVE-2026-3455?

CVE-2026-3455 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-3455 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3455?

CVE-2026-3455 affects Nodemailer Mailparser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3455?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3455 have an EU (EUVD) identifier?

Yes. CVE-2026-3455 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9279.

When was CVE-2026-3455 published?

CVE-2026-3455 was published on 2026-03-03 and last updated on 2026-06-17.

CVE-2026-3455

CVE-2026-3455 is a medium-severity vulnerability in Nodemailer Mailparser with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 2.0
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9279
Weakness: CWE-79
Affected product: Nodemailer Mailparser
Published: 2026-03-03
Last modified: 2026-06-17

Description

Versions of the package mailparser before 3.9.3 are vulnerable to Cross-site Scripting (XSS) via the textToHtml() function due to the improper sanitisation of URLs in the email content. An attacker can execute arbitrary scripts in victim browsers by adding extra quote " to the URL with embedded malicious JavaScript code.

Frequently asked questions

What is CVE-2026-3455?: Versions of the package mailparser before 3.9.3 are vulnerable to Cross-site Scripting (XSS) via the textToHtml() function due to the improper sanitisation of URLs in the email content. An attacker can execute arbitrary scripts in victim browsers by adding extra quote " to the URL with embedded malicious JavaScript code.
How severe is CVE-2026-3455?: CVE-2026-3455 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-3455 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3455?: CVE-2026-3455 affects Nodemailer Mailparser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3455?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3455 have an EU (EUVD) identifier?: Yes. CVE-2026-3455 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9279.
When was CVE-2026-3455 published?: CVE-2026-3455 was published on 2026-03-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nodemailer:mailparser:*:*:*:*:*:node.js:*:*

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