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GHSA-q29v-xc37-wh5m

HighCVSS 7.1 / 10
Published Jun 3, 2026·Last modified Jun 3, 2026
Affected Components(1)
PyPI logodocling
< 2.94.0
Description

Impact

The HTML backend did not perform sufficient validation during resource handling:

  • Accepted file:// URIs enabling local file system access when enable_local_fetch=True
  • Path resolution allowed traversal outside intended directories via ../ sequences and absolute paths
  • Did not block internal network resources under enable_remote_fetch=True
  • HTTP redirects were not validated, potentially redirecting to unintended schemes
  • No resource limits for remote image downloads and data: URIs

Patches

Fixed in versions 2.91.0 (initial fixes) and 2.94.0 (additional improvements). The fixes implement:

  • Updated local path treatment: absolute files always blocked, relative paths require enable_local_fetch=True (default: False) and containment within configured base_path for path traversal protection
  • file:// scheme stripped & treated as local path (above)
  • IP address validation to prevent SSRF
  • HTTP redirect validation, connection and read timeouts
  • Size limit for both remote images (with streaming download) and base64-decoded data URIs

Workarounds

Keep both enable_local_fetch=False and enable_remote_fetch=False (defaults) when processing untrusted HTML documents.

References

Risk Scores
Base Score
7.1

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a low impact on the availability of the system.

Threat Intelligence
6.5

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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High severity
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