CVE-2026-123848

HIGH

Published Nov 6, 2026 Modified Nov 10, 2026 CWE-297

Description

In JetBrains IntelliJ IDEA before 2026.3 host name verification was missing for server TLS certificates

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CVSS v3.1 Score

7.4

HIGH

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

EPSS — Exploit Prediction

0.0020

Probability of exploitation

0.10%

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-297 CWE-297

Affected Products

Vendor	Product	Versions
jetbrains	intellij_idea	< 2026.3

References

Advisories & Patches

https://www.jetbrains.com/privacy-security/issues-fixed/

Frequently Asked Questions

What is CVE-2026-123848? +

In JetBrains IntelliJ IDEA before 2026.3 host name verification was missing for server TLS certificates It has a CVSS v3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-123848? +

CVE-2026-123848 has a CVSS v3.1 score of 7.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0020, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-123848? +

CVE-2026-123848 affects products from jetbrains, specifically: intellij_idea. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-123848? +

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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