PhpWeasyPrint vulnerable to SSRF and local file disclosure via the attachment option

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

• CVE-2026-49359: 0.42% estimated exploitation activity in the next 30 days; percentile 36.59 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary pontedilana/php-weasyprint fetches the content of option values server-side via filegetcontents() when the value looks like a URL, without restricting the URL scheme. The attachment option of Pdf is the reachable sink: any value that passes isOptionUrl() (filtervar(..., FILTERVALIDATEURL)) is downloaded by the PHP process and embedded into the generated PDF. Because FILTERVALIDATEURL accepts http, https, ftp, file and PHP stream wrappers such as php://, an attacker who can influence the attachment value reaches both a Server-Side Request Forgery primitive (e.g. internal HTTP endpoints, cloud metadata) and a local file disclosure primitive (file://, php://filter/...), with the fetched bytes exfiltrated as a PDF attachment. This is the same class of issue KnpLabs/snappy patched for its xsl-style-sheet option in GHSA-c5fp-p67m-gq56. The library is documented as a one-to-one substitute for KnpLabs/snappy and shares the same code shape. Affected versions pontedilana/php-weasyprint…

Published by the source

26 Jun 2026, 22:11 UTC

Last modified by the source

26 Jun 2026, 22:11 UTC

Source last checked

26 Oct 2026, 14:49 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-x8g9-h984-pc36

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# Patch Next advisory brief: CVE-2026-49359

Advisory: PhpWeasyPrint vulnerable to SSRF and local file disclosure via the attachment option
IDs: CVE-2026-49359, GHSA-x8g9-h984-pc36
Record: https://patchnext.com/advisories/cve-2026-49359 (revision 1, source checked 26 Oct 2026, 14:49 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: pontedilana/php-weasyprint 2.6.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist pontedilana/php-weasyprint: affected <= 2.5.1; fixed in 2.6.0

## Suggested inspection (read-only)
- Packagist pontedilana/php-weasyprint: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on pontedilana/php-weasyprint.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-x8g9-h984-pc36 (GitHub-reviewed advisory GHSA-x8g9-h984-pc36 lists affected ranges: Packagist pontedilana/php-weasyprint >=0 <=2.5.1)

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