CVE-2026-53914
JetBrains Kotlin Unsafe Deserialization
Description
In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata
INFO
Published Date :
June 26, 2026, 2:17 p.m.
Last Modified :
June 27, 2026, 7:36 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 547ada31-17d8-4964-bc5f-1b8238ba8014 | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Kotlin to version 2.4.20 or later.
- Ensure build cache metadata is handled securely.
Public PoC/Exploit Available at Github
CVE-2026-53914 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53914.
| URL | Resource |
|---|---|
| https://www.jetbrains.com/privacy-security/issues-fixed/ | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53914 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53914
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Android screenshot autocrop editor. Detects screenshots, opens them in an editor with smart edge detection, and lets you crop and save instantly.
android kotlin
Kotlin
None
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53914 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53914 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:jetbrains:kotlin:*:*:*:*:*:*:*:* versions up to (excluding) 2.4.20 Added Reference Type JetBrains s.r.o.: https://www.jetbrains.com/privacy-security/issues-fixed/ Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 27, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-53914', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-26T13:44:13.526660Z'} {'id': 'CVE-2026-53914', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-26T00:00:00+00:00'} -
New CVE Received by [email protected]
Jun. 26, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'JetBrains', 'product': 'Kotlin', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2.4.20', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata Added CVSS V3.1 AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L Added CWE CWE-502 Added Reference https://www.jetbrains.com/privacy-security/issues-fixed/ -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 26, 2026
Action Type Old Value New Value Added CWE CWE-502 Added SSVC {'id': 'CVE-2026-53914', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-26T13:44:13.526660Z'}