How severe is CVE-2026-43870?

CVE-2026-43870 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-43870 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-43870?

CVE-2026-43870 affects Apache Thrift. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-43870?

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-2026-43870 have an EU (EUVD) identifier?

Yes. CVE-2026-43870 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27245.

When was CVE-2026-43870 published?

CVE-2026-43870 was published on 2026-05-05 and last updated on 2026-06-17.

CVE-2026-43870

CVE-2026-43870 is a high-severity vulnerability in Apache Thrift with a CVSS 3.x base score of 7.3. 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-22.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-27245
Weakness: CWE-22
Affected product: Apache Thrift
Published: 2026-05-05
Last modified: 2026-06-17

Description

Origin Validation Error, Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting'), Uncontrolled Resource Consumption vulnerability in Apache Thrift. This issue affects Apache Thrift: before 0.23.0. Users are recommended to upgrade to version 0.23.0, which fixes the issue.

Frequently asked questions

What is CVE-2026-43870?: Origin Validation Error, Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting'), Uncontrolled Resource Consumption vulnerability in Apache Thrift. This issue affects Apache Thrift: before 0.23.0. Users are recommended to upgrade to version 0.23.0, which fixes the issue.
How severe is CVE-2026-43870?: CVE-2026-43870 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-43870 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-43870?: CVE-2026-43870 affects Apache Thrift. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-43870?: 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-2026-43870 have an EU (EUVD) identifier?: Yes. CVE-2026-43870 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27245.
When was CVE-2026-43870 published?: CVE-2026-43870 was published on 2026-05-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:thrift:*:*:*:*:*:*:*:*

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