CVE-2026-105743— Docling: SSRF guard bypass in remote resource fetching (DNS rebinding / multi-record resolution; no IP validation in HTML render mode)
Quick assessment
Affected
docling-project docling
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Docling 通过解析多种文档格式并提供与生成式 AI 生态系统的集成，简化了文档处理流程。在版本 2.91.0 至 2.132.0 之间， 中的 函数仅通过单次 IPv4 地址解析来验证主机名，随后允许 HTTP 客户端重新解析并处理原始 URL，从而导致 DNS 重绑定攻击、公共地址与内部地址记录混合利用，以及反斜杠权威部分（backslash authority）解析器分歧等问题可能访问到内部服务。此外，使用 配置时，系统允许发起 HTTP 和 HTTPS 的浏览器请求，但未对其最终解析的目标地址进行验证。
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I. Basic Information for CVE-2026-105743
Vulnerability Information
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Vulnerability Title
Docling: SSRF guard bypass in remote resource fetching (DNS rebinding / multi-record resolution; no IP validation in HTML render mode)
Source: CVE Program / CVE List V5
Vulnerability Description
Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.91.0 until 2.132.0, validate_url_safety in docling/backend/utils/image_resource_loader.py validates a hostname with a single IPv4 lookup and then allows the HTTP client to resolve and parse the original URL again, permitting DNS rebinding, mixed public and internal address records, and backslash authority parser disagreement to reach internal services. HTMLBackendOptions(render_page=True) also allows HTTP and HTTPS browser requests without validating their resolved destination. Exploitation requires remote fetching to be enabled, and response content is exposed only when it is decoded as an image or passively rendered in a page screenshot. This issue is fixed in 2.132.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| docling-project | docling | >= 2.91.0, < 2.132.0 | - |
|
| docling-project | docling-slim | >= 2.91.0, < 2.132.0 | - |
|
II. Public POCs for CVE-2026-105743
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-105743 (4)
-
https://github.com/docling-project/docling/pull/4420 x_refsource_MISC
-
https://github.com/docling-project/docling/releases/tag/v2.132.0 x_refsource_MISC
Same Patch Batch · docling-project · 2026-10-05 · 10 CVEs total
| CVE-2026-105744 | 7.5 HIGH | Docling: Arbitrary file read/write (and command execution when shell-escape is enabled) wh |
| CVE-2026-105751 | 6.9 MEDIUM | Docling: Arbitrary local file read via draw:image xlink:href in the OpenDocument backend |
| CVE-2026-105745 | 6.7 MEDIUM | Docling: Plugin entry points are imported before the allow_external_plugins check |
| CVE-2026-105749 | 6.5 MEDIUM | Docling: Unbounded table rowspan/colspan in HTML, JATS, ODS and BoxNote backends causes CP |
| CVE-2026-105750 | 5.9 MEDIUM | Docling: `enable_local_fetch` is not enforced in HTML browser-rendering mode |
| CVE-2026-105748 | 4.3 MEDIUM | Docling: Crafted DoclingDocument JSON embeds local image files into converted output |
| CVE-2026-105747 | 4.3 MEDIUM | Docling: METS-GBS archive member limit enforced after full member enumeration (memory exha |
| CVE-2026-105742 | 3.7 LOW | Docling: Configured HTTP headers sent to every remote image host named by a document |
| CVE-2026-105746 | 2.2 LOW | Docling: KServe v2 OCR engine does not enforce enable_remote_services |
IV. Related Vulnerabilities
Same product: docling
-
CVE-2026-105751
Docling: Arbitrary local file read via draw:image xlink:href -
CVE-2026-105750
Docling: `enable_local_fetch` is not enforced in HTML browse -
CVE-2026-105749
Docling: Unbounded table rowspan/colspan in HTML, JATS, ODS -
CVE-2026-105748
Docling: Crafted DoclingDocument JSON embeds local image fil -
CVE-2026-105747
Docling: METS-GBS archive member limit enforced after full m
Same vendor: docling-project
-
CVE-2026-105751
Docling: Arbitrary local file read via draw:image xlink:href -
CVE-2026-105750
Docling: `enable_local_fetch` is not enforced in HTML browse -
CVE-2026-105749
Docling: Unbounded table rowspan/colspan in HTML, JATS, ODS -
CVE-2026-105748
Docling: Crafted DoclingDocument JSON embeds local image fil -
CVE-2026-105747
Docling: METS-GBS archive member limit enforced after full m
Same weakness: CWE-367
-
CVE-2026-93315
BuildKit proxy CA cleanup can be disrupted by build steps -
CVE-2026-105647
Ghost: Server-Side Request Forgery in Bookmark Fetching -
CVE-2026-77804
Time-of-check Time-of-use (TOCTOU) Race Condition in Root Ce -
CVE-2026-105163
crossplane crossplane-runtime ImageConfig client.go Get toct -
CVE-2026-105130
LaraDashboard 1.4.0 before 1.4.8 Race Condition Bypasses Per
V. Comments for CVE-2026-105743
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