CVE-2026-44520
Docling-Graph: SSRF via Missing Internal IP Validation in URLInputHandler
Docling-Graph turns documents into validated Pydantic objects, then builds a directed knowledge graph with explicit semantic relationships. Prior to 1.5.1, the URLInputHandler class in docling_graph/core/input/handlers.py makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The URLValidator only checks for a valid scheme and non-empty netloc, performing no IP-level validation. Additionally, requests.head() was called with allow_redirects=True, allowing an attacker to redirect requests to internal endpoints via an intermediary URL. An attacker who can control the --source CLI argument or PipelineConfig.source API parameter can trigger Server-Side Request Forgery (SSRF). This vulnerability is fixed in 1.5.1.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Docling-Graph: SSRF via Missing Internal IP Validation in URLInputHandler
Docling-Graph turns documents into validated Pydantic objects, then builds a directed knowledge graph with explicit semantic relationships. Prior to 1.5.1, the URLInputHandler class in docling_graph/core/input/handlers.py makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The URLValidator only checks for a valid scheme and non-empty netloc, performing no IP-level validation. Additionally, requests.head() was called with allow_redirects=True, allowing an attacker to redirect requests to internal endpoints via an intermediary URL. An attacker who can control the --source CLI argument or PipelineConfig.source API parameter can trigger Server-Side Request Forgery (SSRF). This vulnerability is fixed in 1.5.1.
- Record
CVE-2026-44520- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-601, CWE-918
- Updated
- 2026-11-02
EUVDEUVD-2026-30340
Docling-Graph turns documents into validated Pydantic objects, then builds a directed knowledge graph with explicit semantic relationships. Prior to 1.5.1, the URLInputHandler class in docling_graph/core/input/handlers.py makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The URLValidator only checks for a valid scheme and non-empty netloc, performing no IP-level validation. Additionally, requests.head() was called with allow_redirects=True, allowing an attacker to redirect requests to internal endpoints via an intermediary URL. An attacker who can control the --source CLI argument or PipelineConfig.source API parameter can trigger Server-Side Request Forgery (SSRF). This vulnerability is fixed in 1.5.1.
- Record
EUVD-2026-30340- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-fqph-j6v6-jvgx
docling-graph has SSRF via Missing Internal IP Validation in URLInputHandler
Impact
The URLInputHandler class in docling_graph/core/input/handlers.py makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The URLValidator only checks for a valid scheme and non-empty netloc, performing no IP-level validation. Additionally, requests.head() was called with allow_redirects=True, allowing an attacker to redirect requests to internal endpoints via an intermediary URL.
An attacker who can control the --source CLI argument or PipelineConfig.source API parameter can trigger Server-Side Request Forgery (SSRF) to reach:
- Cloud metadata endpoints (e.g.
169.254.169.254) to steal IAM credentials - Internal services on loopback (
127.0.0.1) or private network ranges (10.x,172.16.x,192.168.x)
This affects deployments where docling-graph processes URLs from untrusted input, such as multi-tenant pipelines or server-side automation.
Patches
The vulnerability is fixed in v1.5.1.
Users should upgrade immediately:
pip install --upgrade docling-graph
The fix adds IP validation via ipaddress and socket.gethostbyname() before any request is made, blocks private/loopback/link-local/reserved addresses, and disables redirect following (allow_redirects=False) with explicit validation of any Location header before following it.
Workarounds
If upgrading is not immediately possible, ensure that all URLs passed to URLInputHandler come exclusively from trusted, internal sources, never from user-supplied or external input. There is no safe code-level workaround short of applying the patch, as the vulnerability is in the library itself.
Resources
- Record
GHSA-fqph-j6v6-jvgx- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-601, CWE-918
- Updated
- 2026-11-02
NVD
Docling-Graph turns documents into validated Pydantic objects, then builds a directed knowledge graph with explicit semantic relationships. Prior to 1.5.1, the URLInputHandler class in docling_graph/core/input/handlers.py makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The URLValidator only checks for a valid scheme and non-empty netloc, performing no IP-level validation. Additionally, requests.head() was called with allow_redirects=True, allowing an attacker to redirect requests to internal endpoints via an intermediary URL. An attacker who can control the --source CLI argument or PipelineConfig.source API parameter can trigger Server-Side Request Forgery (SSRF). This vulnerability is fixed in 1.5.1.
- Record
CVE-2026-44520- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-601, CWE-918
- Updated
- 2026-11-02
OSV
Docling-Graph: SSRF via Missing Internal IP Validation in URLInputHandler
Docling-Graph turns documents into validated Pydantic objects, then builds a directed knowledge graph with explicit semantic relationships. Prior to 1.5.1, the URLInputHandler class in docling_graph/core/input/handlers.py makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The URLValidator only checks for a valid scheme and non-empty netloc, performing no IP-level validation. Additionally, requests.head() was called with allow_redirects=True, allowing an attacker to redirect requests to internal endpoints via an intermediary URL. An attacker who can control the --source CLI argument or PipelineConfig.source API parameter can trigger Server-Side Request Forgery (SSRF). This vulnerability is fixed in 1.5.1.
- Record
CVE-2026-44520- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-601, CWE-918
- Updated
- 2026-11-02
OSVGHSA-fqph-j6v6-jvgx
docling-graph has SSRF via Missing Internal IP Validation in URLInputHandler
Impact
The URLInputHandler class in docling_graph/core/input/handlers.py makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The URLValidator only checks for a valid scheme and non-empty netloc, performing no IP-level validation. Additionally, requests.head() was called with allow_redirects=True, allowing an attacker to redirect requests to internal endpoints via an intermediary URL.
An attacker who can control the --source CLI argument or PipelineConfig.source API parameter can trigger Server-Side Request Forgery (SSRF) to reach:
- Cloud metadata endpoints (e.g.
169.254.169.254) to steal IAM credentials - Internal services on loopback (
127.0.0.1) or private network ranges (10.x,172.16.x,192.168.x)
This affects deployments where docling-graph processes URLs from untrusted input, such as multi-tenant pipelines or server-side automation.
Patches
The vulnerability is fixed in v1.5.1.
Users should upgrade immediately:
pip install --upgrade docling-graph
The fix adds IP validation via ipaddress and socket.gethostbyname() before any request is made, blocks private/loopback/link-local/reserved addresses, and disables redirect following (allow_redirects=False) with explicit validation of any Location header before following it.
Workarounds
If upgrading is not immediately possible, ensure that all URLs passed to URLInputHandler come exclusively from trusted, internal sources, never from user-supplied or external input. There is no safe code-level workaround short of applying the patch, as the vulnerability is in the library itself.
Resources
- Record
GHSA-fqph-j6v6-jvgx- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-601, CWE-918
- Updated
- 2026-11-02
OSVPYSEC-2026-2458
docling-graph has SSRF via Missing Internal IP Validation in URLInputHandler
Impact
The URLInputHandler class in docling_graph/core/input/handlers.py makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The URLValidator only checks for a valid scheme and non-empty netloc, performing no IP-level validation. Additionally, requests.head() was called with allow_redirects=True, allowing an attacker to redirect requests to internal endpoints via an intermediary URL.
An attacker who can control the --source CLI argument or PipelineConfig.source API parameter can trigger Server-Side Request Forgery (SSRF) to reach:
- Cloud metadata endpoints (e.g.
169.254.169.254) to steal IAM credentials - Internal services on loopback (
127.0.0.1) or private network ranges (10.x,172.16.x,192.168.x)
This affects deployments where docling-graph processes URLs from untrusted input, such as multi-tenant pipelines or server-side automation.
Patches
The vulnerability is fixed in v1.5.1.
Users should upgrade immediately:
pip install --upgrade docling-graph
The fix adds IP validation via ipaddress and socket.gethostbyname() before any request is made, blocks private/loopback/link-local/reserved addresses, and disables redirect following (allow_redirects=False) with explicit validation of any Location header before following it.
Workarounds
If upgrading is not immediately possible, ensure that all URLs passed to URLInputHandler come exclusively from trusted, internal sources, never from user-supplied or external input. There is no safe code-level workaround short of applying the patch, as the vulnerability is in the library itself.
Resources
- Record
PYSEC-2026-2458- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
docling-graphPyPI |
through 1.5.0 | 1.5.1 |
docling-graphPyPI |
before 1.5.1, plus listed versions 0.2.40.2.50.3.00.4.00.4.1 Show 13 moreShow less1.0.01.1.01.2.01.2.11.2.21.2.31.2.41.3.01.3.11.4.01.4.31.4.41.5.0 |
1.5.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-44520 is a medium vulnerability (CVSS 5.7) in Docling-project Docling-graph, published May 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.19%, the 8th percentile. Fixed in docling-graph 1.5.1.
References
github.com/docling-project/docling-graph/security/advisories/GHSA-fqph-j6v6-jvgx
cheatsheetseries.owasp.org/cheatsheets/Server_Side_Request_Forgery_Prevention_Cheat_Sheet.html
nvd.nist.gov/vuln/detail/CVE-2026-44520
pypi.org/project/docling-graph