How severe is CVE-2026-7210?

CVE-2026-7210 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-7210 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-7210?

CVE-2026-7210 affects Python. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-7210?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-7210 have an EU (EUVD) identifier?

Yes. CVE-2026-7210 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29178.

When was CVE-2026-7210 published?

CVE-2026-7210 was published on 2026-05-11 and last updated on 2026-06-17.

CVE-2026-7210

CVE-2026-7210 is a high-severity vulnerability in Python with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-331.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 6.3
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29178
Weakness: CWE-331
Affected product: Python
Published: 2026-05-11
Last modified: 2026-06-17

Description

`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.

Frequently asked questions

What is CVE-2026-7210?: `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.
How severe is CVE-2026-7210?: CVE-2026-7210 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-7210 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-7210?: CVE-2026-7210 affects Python. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-7210?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-7210 have an EU (EUVD) identifier?: Yes. CVE-2026-7210 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29178.
When was CVE-2026-7210 published?: CVE-2026-7210 was published on 2026-05-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:python:python:*:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

41.63.62.103 (ipv4-addr)
203.192.232.180 (ipv4-addr)
149.86.233.213 (ipv4-addr)
141.109.168.26 (ipv4-addr)
141.109.168.107 (ipv4-addr)
125.212.235.194 (ipv4-addr)
120.28.109.188 (ipv4-addr)
103.61.123.132 (ipv4-addr)