How severe is CVE-2026-44020?

CVE-2026-44020 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-44020 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44020?

CVE-2026-44020 affects Docling. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44020?

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

Does CVE-2026-44020 have an EU (EUVD) identifier?

Yes. CVE-2026-44020 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39004.

When was CVE-2026-44020 published?

CVE-2026-44020 was published on 2026-06-24 and last updated on 2026-06-30.

CVE-2026-44020

CVE-2026-44020 is a high-severity vulnerability in Docling with a CVSS 3.x base score of 7.5. 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-776.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39004
Weakness: CWE-776
Affected product: Docling
Published: 2026-06-24
Last modified: 2026-06-30

Description

Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.13.0 until 2.74.0, the USPTO patent XML parser used the standard xml.sax.parseString() without protection against XML External Entity (XXE) attacks. An attacker could craft malicious USPTO patent XML files with external entity references that could read arbitrary files from the server filesystem, perform Server-Side Request Forgery (SSRF) attacks, or cause denial of service through entity expansion (Billion Laughs attack). The vulnerability affects three USPTO patent format parsers: ICE (v4.x), Grant v2.5, and Application v1.x. This vulnerability is fixed in 2.74.0.

Frequently asked questions

What is CVE-2026-44020?: Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.13.0 until 2.74.0, the USPTO patent XML parser used the standard xml.sax.parseString() without protection against XML External Entity (XXE) attacks. An attacker could craft malicious USPTO patent XML files with external entity references that could read arbitrary files from the server filesystem, perform Server-Side Request Forgery (SSRF) attacks, or cause denial of service through entity expansion (Billion Laughs attack). The vulnerability affects three USPTO patent format parsers: ICE (v4.x), Grant v2.5, and Application v1.x. This vulnerability is fixed in 2.74.0.
How severe is CVE-2026-44020?: CVE-2026-44020 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-44020 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44020?: CVE-2026-44020 affects Docling. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44020?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-44020 have an EU (EUVD) identifier?: Yes. CVE-2026-44020 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39004.
When was CVE-2026-44020 published?: CVE-2026-44020 was published on 2026-06-24 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:docling:docling:*:*:*:*:*:python:*:*

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