CVE-2026-43870

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.

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CVSS v3.1 Score

7.3

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploit Prediction

0.0003

Probability of exploitation

0.08%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-22 Path Traversal

CWE-113 CWE-113

CWE-346 CWE-346

CWE-400 Uncontrolled Resource Consumption

Affected Products

Vendor	Product	Versions
apache	thrift	< 0.23.0

References

Advisories & Patches

https://lists.apache.org/thread/pgtfq44ltc9t63kxcbqmwqzt45pnhqdy

Other References

http://www.openwall.com/lists/oss-security/2026/05/05/4

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. It has a CVSS v3.1 base score of 7.3 (HIGH).

How severe is CVE-2026-43870? +

CVE-2026-43870 has a CVSS v3.1 score of 7.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0003, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-43870? +

CVE-2026-43870 affects products from apache, specifically: thrift. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-43870? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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