Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
WeasyPrint versions before 70.0 do not apply the document's url_fetcher to the xmp_metadata and stylesheets arguments of write_pdf(), so a restrictive fetcher set on HTML() is bypassed for those inputs. An attacker who can influence the xmp_metadata path can read local files the rendering process can access and receive their contents in the PDF, and an attacker who can influence a stylesheets URL or path can cause local or internal resources to be fetched and applied. Upgrade to weasyprint 70.0 or later. If upgrading is not possible, do not pass untrusted values to xmp_metadata or stylesheets.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.2 | Medium | 3.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0022, the 13th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:10 UTC First seen by agentprime
- 31 Oct 2026, 14:10 UTC Confirmed by OSV