Improper handling of highly compressed data in jwcrypto - CVE-2026-39373
Published: April 8, 2026
Vulnerability identifier: #VU125313
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-39373
CWE-ID: CWE-409
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: latchset
Affected software:
jwcrypto
jwcrypto
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper handling of highly compressed data in the deserialize function when processing crafted JWE tokens with ZIP compression. A remote attacker can send a specially crafted JWE token to cause a denial of service.
Memory-constrained systems are more likely to be affected.
How to mitigate CVE-2026-39373
Install security update from vendor's website.