vulnerability / NVI-00012111 / Revision 3
Docling: Crafted DoclingDocument JSON embeds local image files into converted output
GitHub lists this reviewed advisory for docling, docling-slim. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
4.3 medium
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
4.3 MEDIUM (3.1)
security-advisories@github.com severity; no combined Null risk score.
0.304%
FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.23221. Missing scores are unknown.
As of · FIRST EPSS
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
docling
source listed>= 2.16.0, < 2.131.0
### Summary docling accepts serialized `DoclingDocument` JSON as an input format (`InputFormat.JSON_DOCLING`, enabled by default). A crafted JSON file can set a picture's image `uri` to a local file path. When the converted document is exported with embedded images (`ImageRefMode.EMBEDDED`, the CLI default for Markdown and HTML), the referenced file is read and embedded as base64 in the output. ### Details `docling/backend/json/docling_json_backend.py` validates the JSON into a `DoclingDocument` without checking image references. The file is then read by docling-core: - `DoclingDocument._with_embedded_pictures` opens `file://` and plain-path URIs with PIL. - `ImageRef.pil_image` checks `allow_image_file_uri` for `file://` URIs but not for plain `Path` values. docling's picture enrichment models load images through this property. Only files that PIL can decode as an image are disclosed. Other files, such as text files or keys, fail to decode and are not embedded. The different error behaviour does reveal whether a path exists. ### Impact Disclosure of image files readable by the converting process (for example other users' uploads or page images in a shared service), and disc
docling-slim
source listed>= 2.92.0, < 2.131.0
### Summary docling accepts serialized `DoclingDocument` JSON as an input format (`InputFormat.JSON_DOCLING`, enabled by default). A crafted JSON file can set a picture's image `uri` to a local file path. When the converted document is exported with embedded images (`ImageRefMode.EMBEDDED`, the CLI default for Markdown and HTML), the referenced file is read and embedded as base64 in the output. ### Details `docling/backend/json/docling_json_backend.py` validates the JSON into a `DoclingDocument` without checking image references. The file is then read by docling-core: - `DoclingDocument._with_embedded_pictures` opens `file://` and plain-path URIs with PIL. - `ImageRef.pil_image` checks `allow_image_file_uri` for `file://` URIs but not for plain `Path` values. docling's picture enrichment models load images through this property. Only files that PIL can decode as an image are disclosed. Other files, such as text files or keys, fail to decode and are not embedded. The different error behaviour does reveal whether a path exists. ### Impact Disclosure of image files readable by the converting process (for example other users' uploads or page images in a shared service), and disc
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. FIRST EPSS
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
- NVD lastModified does not establish freshness of every associated CPE record.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-p944-4xh2-x776 ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
- CVE-2026-105748 ↗
NIST National Vulnerability Database · official catalog
Observed . This product uses data from the NVD API but is not endorsed or certified by the NVD.
- CVE-2026-105748 ↗
FIRST EPSS · official catalog
Observed . FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 3 ·
Source facts changed; compare the preserved prior revision.
- Revision 2 ·
Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.