CVE-2026-56001

HIGHNVD 8.88.5▼
EchelonGraph scoreHIGH confidence

Score 8.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-08. NVD baseline CVSS 8.8; sources differ by 0.3.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 6 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

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

A heap buffer overflow in BitmapScaleBitmaps in libXfont2 before 2.0.8 due to an overflowing 32bit size could be used by attackers able to access the X Server to execute code within the X server cont

CVSS v3
8.8
EG Score
8.5(high)
EPSS
30.1%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 9, 2026

Advisory Details (2)

Auto-updated Jul 8, 2026
No patch confirmed yet.
generic

oss-security - FW: X.Org Security Advisory: multiple security issues in libXfont2

https://www.openwall.com/lists/oss-security/2026/07/08/1
generic

bitscale: fix integer overflow in BitmapScaleBitmaps bytestoalloc (be0b08e2) · Commits · xorg / lib / libXfont · GitLab

https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/be0b08e2d354138d3222b4490e2a77c6ee42f778

Vendor Advisories for CVE-2026-56001(2)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 36× in last 7d / 36× 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. 2026-07-14 05:48 UTCEG score recompute
  2. 2026-07-14 05:48 UTCVendor advisory
  3. 2026-07-14 05:48 UTCGHSA enrichment
  4. 2026-07-13 22:31 UTCEPSS rescore
  5. 2026-07-13 17:02 UTCEG score recompute
  6. 2026-07-13 17:02 UTCGHSA enrichment
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-13 06:13 UTCEPSS rescore
  9. 2026-07-13 04:14 UTCEG score recompute
  10. 2026-07-13 04:14 UTCGHSA enrichment
  11. 2026-07-12 15:27 UTCEG score recompute
  12. 2026-07-12 15:27 UTCGHSA enrichment
  13. 2026-07-12 05:46 UTCEPSS rescore
  14. 2026-07-12 02:40 UTCEG score recompute
  15. 2026-07-12 02:40 UTCGHSA enrichment
  16. 2026-07-11 13:52 UTCEG score recompute
  17. 2026-07-11 13:52 UTCGHSA enrichment
  18. 2026-07-11 08:27 UTCEPSS rescore
  19. 2026-07-11 08:27 UTCEPSS rescore
  20. 2026-07-11 01:06 UTCEG score recompute
  21. 2026-07-11 01:06 UTCGHSA enrichment
  22. 2026-07-10 12:17 UTCEG score recompute
  23. 2026-07-10 12:17 UTCGHSA enrichment
  24. 2026-07-09 23:30 UTCEG score recompute
  25. 2026-07-09 23:30 UTCGHSA enrichment
Show 11 more
  1. 2026-07-09 19:48 UTCNVD updateCVSS v3 → 8.8
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-09 19:10 UTCEPSS rescore
  4. 2026-07-09 10:44 UTCEG score recompute
  5. 2026-07-09 10:44 UTCGHSA enrichment
  6. 2026-07-08 21:58 UTCEG score recompute
  7. 2026-07-08 21:58 UTCGHSA enrichment
  8. 2026-07-08 15:16 UTCEPSS rescore
  9. 2026-07-08 15:16 UTCEPSS rescore
  10. 2026-07-08 09:12 UTCEG score recompute
  11. 2026-07-08 09:11 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-56001?
CVE-2026-56001 is a high vulnerability published on July 8, 2026. A heap buffer overflow in BitmapScaleBitmaps in libXfont2 before 2.0.8 due to an overflowing 32bit size could be used by attackers able to access the X Server to execute code within the X server cont
When was CVE-2026-56001 disclosed?
CVE-2026-56001 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56001 actively exploited?
CVE-2026-56001 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56001?
CVE-2026-56001 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.5.
How do I remediate CVE-2026-56001?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56001, 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

Explore the affected products and dependency analysis for CVE-2026-56001

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