How severe is CVE-2026-34071?

CVE-2026-34071 has a CVSS 3.x base score of 5.4, 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-2026-34071 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34071?

CVE-2026-34071 affects Stirling Stirling Pdf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34071?

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

Does CVE-2026-34071 have an EU (EUVD) identifier?

Yes. CVE-2026-34071 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16271.

When was CVE-2026-34071 published?

CVE-2026-34071 was published on 2026-03-26 and last updated on 2026-06-17.

CVE-2026-34071

CVE-2026-34071 is a medium-severity vulnerability in Stirling Stirling Pdf with a CVSS 3.x base score of 5.4. 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 5.4)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16271
Weakness: CWE-79
Affected product: Stirling Stirling Pdf
Published: 2026-03-26
Last modified: 2026-06-17

Description

Stirling-PDF is a locally hosted web application that allows you to perform various operations on PDF files. In version 2.7.3, the /api/v1/convert/eml/pdf endpoint with parameter downloadHtml=true returns unsanitized HTML from the email body with Content-Type: text/html. An attacker who sends a malicious email to a Stirling-PDF user can achieve JavaScript execution when that user exports the email using the "Download HTML intermediate file" feature. Version 2.8.0 fixes the issue.

Frequently asked questions

What is CVE-2026-34071?: Stirling-PDF is a locally hosted web application that allows you to perform various operations on PDF files. In version 2.7.3, the /api/v1/convert/eml/pdf endpoint with parameter downloadHtml=true returns unsanitized HTML from the email body with Content-Type: text/html. An attacker who sends a malicious email to a Stirling-PDF user can achieve JavaScript execution when that user exports the email using the "Download HTML intermediate file" feature. Version 2.8.0 fixes the issue.
How severe is CVE-2026-34071?: CVE-2026-34071 has a CVSS 3.x base score of 5.4, 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-2026-34071 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34071?: CVE-2026-34071 affects Stirling Stirling Pdf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34071?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34071 have an EU (EUVD) identifier?: Yes. CVE-2026-34071 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16271.
When was CVE-2026-34071 published?: CVE-2026-34071 was published on 2026-03-26 and last updated on 2026-06-17.

References

https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-xmhg-fv84-jgfc

Affected products (1)

cpe:2.3:a:stirling:stirling_pdf:2.7.3:*:*:*:*:*:*:*

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