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CVE-2026-6653

High7.0

Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.

CVSS
7.0v4.0
EPSS (exploit probability)
0.4%28th pct
CISA KEV
Not listed

EPSS trendFIRST daily scores, last 90 days

FIRST EPSS held steady from 0.4% on 2026-09-18 to 0.4% on 2026-10-20, ranging 0.4%–0.4% across 31 daily scores.
2026-09-18 → 2026-10-20 · 31 days · 0.4%–0.4%
Daily values
FIRST EPSS daily scores for this CVE
Score dateEPSSPercentile
2026-10-200.4%27.8%
2026-10-190.4%27.8%
2026-10-180.4%27.7%
2026-10-160.4%27.7%
2026-10-150.4%27.6%
2026-10-140.4%27.6%
2026-10-130.4%27.4%
2026-10-120.4%27.3%
2026-10-110.4%27.3%
2026-10-100.4%27.3%
2026-10-090.4%27.2%
2026-10-080.4%27.2%
2026-10-070.4%27.2%
2026-10-060.4%27.1%
2026-10-050.4%27.0%
2026-10-040.4%27.0%
2026-10-030.4%27.0%
2026-10-020.4%27.0%
2026-10-010.4%26.9%
2026-09-300.4%26.9%
2026-09-290.4%26.8%
2026-09-270.4%26.7%
2026-09-260.4%26.7%
2026-09-250.4%26.6%
2026-09-240.4%26.5%
2026-09-230.4%29.3%
2026-09-220.4%29.3%
2026-09-210.4%29.2%
2026-09-200.4%29.3%
2026-09-190.4%29.3%
2026-09-180.4%29.3%

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • xmlsoft libxml2

Coverage1 article

References

Facts sourced from NVD, FIRST EPSS, and CISA KEV. Last synced 2026-10-21 08:34 UTC.

  • CVSS & description: NVD 2.0, fetched 2026-10-21 05:34 UTC
  • EPSS: FIRST EPSS, fetched 2026-10-21 08:34 UTC; score date 2026-10-20
  • KEV: CISA KEV, fetched 2026-10-21 08:34 UTC