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Fencer Vulns
high 7.5

CVE-2026-7210 json

The expat and elementtree parsers use insufficient entropy for XML hash-flooding protection

published 2026-05-11 5 mo ago modified 2026-10-26 13 d ago also BIT-libpython-2026-7210 , BIT-python-2026-7210 , BIT-python-min-2026-7210 , EUVD-2026-29178

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

`xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying this patch.

Patch / fix

  • bitnami libpython 3.10.22, 3.11.16, 3.12.14, 3.13.14, 3.14.6
  • bitnami python 3.10.22, 3.11.16, 3.12.14, 3.13.14, 3.14.6
  • bitnami python-min 3.10.22, 3.11.16, 3.12.14, 3.13.14, 3.14.6
  • Python Software Foundation CPython 3.10.22, 3.11.16, 3.12.14, 3.13.14, 3.14.6, 3.15.0b2
  • python3.14 Debian 14 3.14.6-1

debian advisories DEBIAN-CVE-2026-7210

  • python3.10 hummingbird 1 3.10.21-1.4.hum1
  • python3.10-idle hummingbird 1 3.10.21-1.4.hum1
  • python3.10-libs hummingbird 1 3.10.21-1.4.hum1
  • python3.10-test hummingbird 1 3.10.21-1.4.hum1
  • python3.10-tkinter hummingbird 1 3.10.21-1.4.hum1
  • python3.13 hummingbird 1 3.13.15-1.3.hum1
  • python3.13-idle hummingbird 1 3.13.15-1.3.hum1
  • python3.13-libs hummingbird 1 3.13.15-1.3.hum1

red hat advisories RHSA-2026:69069RHSA-2026:68309RHSA-2026:68154RHSA-2026:68135RHSA-2026:67572

  • python3 SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +11 more 3.6.15-150300.10.129.1
  • python3-core SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +12 more 3.6.15-150300.10.129.1
  • python310 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 3.10.22-150400.4.129.1
  • python310-core SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 3.10.22-150400.4.129.1
  • grafana Multi Linux Manager Tools SLE-15 12.4.10-150002.4.27.1
  • mgr-push Multi Linux Manager Tools SLE-15 5.2.5-150002.3.12.1
  • spacecmd Multi Linux Manager Tools SLE-15 5.2.10-150002.3.15.1
  • uyuni-tools Multi Linux Manager Tools SLE-Micro-5, Multi Linux Manager Tools SLE-15 5.2.17-150002.3.20.1

suse advisories SUSE-SU-2026:4754-1SUSE-SU-2026:4743-1SUSE-SU-2026:4630-1SUSE-SU-2026:4585-1SUSE-SU-2026:4584-1SUSE-SU-2026:4583-1

  • python311 openSUSE Tumbleweed 3.11.15-8.1
  • python312 openSUSE Tumbleweed 3.12.13-8.1
  • python313 openSUSE Tumbleweed 3.13.14-1.1
  • python310 openSUSE Tumbleweed 3.10.20-7.1
  • python314 openSUSE Tumbleweed 3.14.6-1.1
  • python315 openSUSE Tumbleweed 3.15.0~b2-1.1

opensuse advisories openSUSE-SU-2026:11427-1openSUSE-SU-2026:11428-1openSUSE-SU-2026:11342-1openSUSE-SU-2026:11285-1openSUSE-SU-2026:11181-1openSUSE-SU-2026:11101-1

  • python3 Alpine 3.23, Alpine 3.22, Alpine 3.21 3.12.14-r0
  • python3 Alpine 3.24 3.14.7-r0

alpine advisories ALPINE-CVE-2026-7210

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-7210 updated cvss 5.3

python: Python/Expat: Denial of Service via crafted XML document

  • Red Hat Exploit Intelligence exploit-intelligence-tech-preview/vulnerability-analysis-rhel9 Red Hat AI Inference Server rhaii/vllm-cpu-rhel9, rhaii/vllm-tpu-rhel9, rhaii/vllm-cuda-rhel9, rhaii/vllm-rocm-rhel9, rhaiis/vllm-cpu-rhel9, rhaiis/vllm-tpu-rhel9, +9 more Red Hat Enterprise Linux 6 python, tkinter, python-libs, python-test, python-tools Red Hat Enterprise Linux 7 python, python3, tkinter, python-libs, python-test, python-tools, +4 more Red Hat Enterprise Linux 8 scipy, python3, python36, python3.12, python-nose, python-wheel, +31 more Red Hat Enterprise Linux 9 python3, python3.9, python3.12, python3.14, python3-idle, python3-libs, +16 more
    +3 more products
    Red Hat Enterprise Linux 10 python3.12, python3.14 Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/bootc-aws-cuda-rhel9, rhelai3/bootc-gcp-cuda-rhel9, rhelai3/bootc-azure-cuda-rhel9, +1 more Red Hat OpenShift AI (RHOAI) rhoai/rhai-cli-rhel9, rhoai/odh-automl-rhel9, rhoai/odh-mlflow-rhel9, rhoai/odh-autorag-rhel9, rhoai/odh-mlserver-rhel9, rhai/base-image-cpu-rhel9, +60 more
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images python3 3.14.7-1.2.hum1, python3.14 3.14.7-1.2.hum1, python3.10 3.10.21-1.4.hum1, python3.11 3.11.16-1.4.hum1, python3.12 3.12.14-1.3.hum1, python3.13 3.13.15-1.3.hum1, +27 more
    fixed: vendor fix RHSA-2026:67572
  • Red Hat Hardened Images hi/python
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.67% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 6.3 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA 4.0 6.3 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami libpython
<3.10.22
>=3.11.0, <3.11.16
>=3.12.0, <3.12.14
>=3.13.0, <3.13.14
>=3.14.0, <3.14.6
3.10.22
3.11.16
3.12.14
3.13.14
3.14.6
bitnami python
<3.10.22
>=3.11.0, <3.11.16
>=3.12.0, <3.12.14
>=3.13.0, <3.13.14
>=3.14.0, <3.14.6
3.10.22
3.11.16
3.12.14
3.13.14
3.14.6
bitnami python-min
<3.10.22
>=3.11.0, <3.11.16
>=3.12.0, <3.12.14
>=3.13.0, <3.13.14
>=3.14.0, <3.14.6
3.10.22
3.11.16
3.12.14
3.13.14
3.14.6

Affected products

  • Python Software Foundation CPython

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.