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Public proof of conceptFix available

CVE-2026-105742

Docling: Configured HTTP headers sent to every remote image host named by a document

A public proof of concept exists; no exploitation attested.

  • Published2026-10-05
  • Fixed in2.132.0
  • WeaknessCWE-201 · CWE-522

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.95.0 until 2.132.0, the HTML image resource loader in docling/backend/utils/image_resource_loader.py forwards headers configured through the HTMLBackendOptions.headers setting to every remote image URL named by an untrusted document when enable_remote_fetch=True and fetch_images=True. The loader does not restrict those credentials to the source document's origin, allowing requests that carry custom headers such as API keys and cookies to follow cross-origin redirects and expose the caller's configured credentials to a document author. The default configuration is not affected because remote fetching and configured headers are required. This issue is fixed in 2.132.0.

Timeline

dates in UTC
  1. 2026-10-0522:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-105742?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-105742?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Docling
BranchAffectedFixed in
2.x≥ 2.95.0, < 2.132.02.132.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2026-105742 Red Hat Product Security7 known affected

    docling: docling: Information disclosure via cross-origin header leakage during remote image fetching

    lightspeed-core/rag-tool-cpu-rhel9 as a component of Lightspeed Core · lightspeed-core/rag-tool-cuda-12.9-rhel9 as a component of Lightspeed Core · rhai-early-access/docling-sdk-cuda-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · +4 more

Full record on NVD

Fix

  1. Update Docling to 2.132.0
  2. Workaround from the vendor Red Hat Product Security CVE-2026-105742 · 7 productsUsers can avoid this exposure by disabling remote image fetching in the HTML backend options (enable_remote_fetch=False), disabling image fetching altogether (fetch_images=False), or by not configuring sensitive headers such as API keys, session tokens, or cookies via HTMLBackendOptions.headers. Th…
  3. No fix available, says the vendor Red Hat Product Security CVE-2026-105742 · 7 productsFix deferred

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionpoc2026-10-06
  • OpenCVESSVC decisionpoc—
  • CNACVSS 3.13.7read 2026-10-23
  • NVDCVSS 3.15.3read 2026-10-23
  • CNAweakness (CWE)CWE-201, CWE-522read 2026-10-23
  • FIRST EPSSEPSS score0.2 %2026-10-22
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Published
2026-10-05
Last Modified
2026-10-07
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-105742?

Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.95.0 until 2.132.0, the HTML image resource loader in docling/backend/utils/image_resource_loader.py forwards headers configured through the HTMLBackendOptions.headers setting to every remote image URL named by an untrusted document when enable_remote_fetch=True and fetch_images=True. The loader does not restrict those credentials to the source document's origin, allowing requests that carry custom headers such as API keys and cookies to follow cross-origin redirects and expose the caller's configured credentials to a document author. The default configuration is not affected because remote fetching and configured headers are required. This issue is fixed in 2.132.0.

Is CVE-2026-105742 actively exploited?

A proof-of-concept exploit exists for CVE-2026-105742, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-105742?

CVE-2026-105742 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

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