CVE-2026-49452

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-07-06. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

WeasyPrint helps web developers to create PDF documents. Prior to 69.0, WeasyPrint embeds unescaped HTML presentational-hint attribute values into CSS in weasyprint/css/__init__.py when presentational_hints=True. The background attribute is inserted into a background-image:url() declaration and parsed by tinycss2.parse_blocks_contents(), allowing untrusted HTML to inject additional CSS declarations. Applications that render untrusted HTML with presentational hints enabled can be affected by CSS injection and server-side requests through injected url() values. This issue is fixed in version 69.0.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
60(Attend)
EG Risk 60/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

July 6, 2026

Last Modified

August 19, 2026

Advisory Details (4)

Auto-updated Aug 18, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available🟡 PoC Available

CSS Injection via Presentational Hints in WeasyPrint · Advisory · Kozea/WeasyPrint · GitHub

https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jhhc-3hcp-qhm5
github_release Patch Available

v69.0

Patch available: Kozea/WeasyPrint v69.0

https://github.com/Kozea/WeasyPrint/releases/tag/v69.0
github_pr Patch Available

Use HTML parsers for presentational hints

Patch available: Kozea/WeasyPrint v69.0 (PR #2773 merged 2026-05-25)

https://github.com/Kozea/WeasyPrint/pull/2773
github_commit Patch Available

commit e158264e33fa (Kozea/WeasyPrint)

Patch available: Kozea/WeasyPrint v69.0 (contains commit e158264e33fa)

https://github.com/Kozea/WeasyPrint/commit/e158264e33fa399b29f415d30719c1d85a55df1d

Vendor Advisories for CVE-2026-49452(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
pipweasyprint—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
weasyprint51-2 ... 69.0-2 (25 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
weasyprint57.2-1 ... 69.0-2 (14 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
weasyprint62.3-1, 67.0-1, 69.0-1, 69.0-2——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
weasyprint62.3-1, 67.0-169.0-1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
weasyprint0.1 ... 68.1 (118 versions)——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 51× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-30 19:17 UTCEPSS rescore
  2. 2026-08-30 08:14 UTCEG score recompute
  3. 2026-08-30 08:14 UTCGHSA enrichment
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-28 21:41 UTCEPSS rescore
  6. 2026-08-27 21:59 UTCEG score recompute
  7. 2026-08-27 21:59 UTCGHSA enrichment
  8. 2026-08-27 14:25 UTCEPSS rescore
  9. 2026-08-26 14:46 UTCEPSS rescore
  10. 2026-08-26 13:55 UTCEG score recompute
  11. 2026-08-26 13:55 UTCGHSA enrichment
  12. 2026-08-25 13:49 UTCEPSS rescore
  13. 2026-08-24 20:48 UTCEG score recompute
  14. 2026-08-24 20:48 UTCGHSA enrichment
  15. 2026-08-23 18:31 UTCEG score recompute
  16. 2026-08-23 18:31 UTCGHSA enrichment
  17. 2026-08-23 00:19 UTCEPSS rescore
  18. 2026-08-22 18:02 UTCEG score recompute
  19. 2026-08-22 18:02 UTCGHSA enrichment
  20. 2026-08-21 23:49 UTCEPSS rescore
  21. 2026-08-21 17:24 UTCEG score recompute
  22. 2026-08-21 17:24 UTCGHSA enrichment
  23. 2026-08-20 22:55 UTCEPSS rescore
  24. 2026-08-20 16:55 UTCEG score recompute
  25. 2026-08-20 16:55 UTCGHSA enrichment
Show 47 more
  1. 2026-08-19 17:04 UTCEPSS rescore
  2. 2026-08-19 16:26 UTCEG score recompute
  3. 2026-08-19 16:26 UTCGHSA enrichment
  4. 2026-08-19 15:30 UTCEG score recompute
  5. 2026-08-19 15:29 UTCGHSA enrichment
  6. 2026-08-18 18:25 UTCEG score recompute
  7. 2026-08-18 18:25 UTCGHSA enrichment
  8. 2026-08-18 18:15 UTCGHSA enrichment
  9. 2026-08-17 23:38 UTCGHSA enrichment
  10. 2026-08-16 23:09 UTCGHSA enrichment
  11. 2026-08-15 22:40 UTCGHSA enrichment
  12. 2026-08-14 22:10 UTCGHSA enrichment
  13. 2026-08-13 21:41 UTCGHSA enrichment
  14. 2026-08-12 21:12 UTCGHSA enrichment
  15. 2026-08-11 20:34 UTCGHSA enrichment
  16. 2026-08-10 20:06 UTCGHSA enrichment
  17. 2026-08-09 19:37 UTCGHSA enrichment
  18. 2026-08-08 19:09 UTCGHSA enrichment
  19. 2026-08-07 18:40 UTCGHSA enrichment
  20. 2026-08-06 18:09 UTCGHSA enrichment
  21. 2026-08-05 17:40 UTCEG score recompute
  22. 2026-08-05 17:40 UTCGHSA enrichment
  23. 2026-08-04 17:12 UTCGHSA enrichment
  24. 2026-08-03 16:43 UTCGHSA enrichment
  25. 2026-08-02 16:14 UTCGHSA enrichment
  26. 2026-08-01 15:45 UTCGHSA enrichment
  27. 2026-07-31 15:16 UTCGHSA enrichment
  28. 2026-07-30 14:47 UTCEG score recompute
  29. 2026-07-30 14:47 UTCGHSA enrichment
  30. 2026-07-29 14:15 UTCGHSA enrichment
  31. 2026-07-28 13:46 UTCGHSA enrichment
  32. 2026-07-27 13:16 UTCGHSA enrichment
  33. 2026-07-26 12:47 UTCEG score recompute
  34. 2026-07-26 12:47 UTCGHSA enrichment
  35. 2026-07-23 03:18 UTCEG score recompute
  36. 2026-07-16 23:13 UTCGHSA enrichment
  37. 2026-07-15 22:44 UTCGHSA enrichment
  38. 2026-07-14 22:15 UTCGHSA enrichment
  39. 2026-07-13 21:46 UTCGHSA enrichment
  40. 2026-07-12 21:17 UTCGHSA enrichment
  41. 2026-07-11 20:48 UTCGHSA enrichment
  42. 2026-07-10 20:19 UTCGHSA enrichment
  43. 2026-07-09 19:49 UTCGHSA enrichment
  44. 2026-07-08 19:20 UTCGHSA enrichment
  45. 2026-07-07 18:51 UTCGHSA enrichment
  46. 2026-07-06 18:22 UTCEG score recompute
  47. 2026-07-06 18:21 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-49452?
CVE-2026-49452 is a medium vulnerability published on July 6, 2026. WeasyPrint helps web developers to create PDF documents. Prior to 69.0, WeasyPrint embeds unescaped HTML presentational-hint attribute values into CSS in weasyprint/css/init.py when presentationalhints=True. The background attribute is inserted into a background-image:url() declaration and parsed…
When was CVE-2026-49452 disclosed?
CVE-2026-49452 was first published in the National Vulnerability Database on July 6, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49452 actively exploited?
CVE-2026-49452 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.7% of all scored CVEs.
What is the CVSS score of CVE-2026-49452?
CVE-2026-49452 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-49452?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49452, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-49452

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