CVE-2026-80179Medium· 5.9▾ TwilightPoC availableA flaw was found in jwcrypto. A remote attacker can send a specially crafted JSON Web Encryption (JWE) token containing numerous period delimiters. This malformed token can force the JWE.deserialize() function to allocate excessive memor…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 32.5 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 9.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.3%
A flaw was found in jwcrypto. A remote attacker can send a specially crafted JSON Web Encryption (JWE) token containing numerous period delimiters. This malformed token can force the JWE.deserialize() function to allocate excessive memory, leading to a MemoryError. This issue results in a denial of service (DoS) for services that process untrusted JWE values.
ansible-automation-platform-24/controller-rhel8 (all versions)ansible-automation-platform-24/lightspeed-rhel8 (all versions)ansible-automation-platform-25/controller-rhel8 (all versions)ansible-automation-platform-25/gateway-rhel8 (all versions)ansible-automation-platform-25/lightspeed-rhel8 (all versions)ansible-automation-platform-26/controller-rhel9 (all versions)ansible-automation-platform-26/gateway-rhel9 (all versions)ansible-automation-platform-26/lightspeed-rhel9 (all versions)ansible-automation-platform-27/gateway-rhel9 (all versions)ansible-automation-platform-27/lightspeed-rhel9 (all versions)automation-controller (all versions)python3.11-jwcrypto (all versions)python3.12-jwcrypto (all versions)python-jwcrypto (all versions)python-jwcrypto (all versions)rhoai/odh-feature-server-rhel9 (all versions)rhoai/odh-kserve-storage-initializer-rhel9 (all versions)rhosp-rhel8/openstack-mistral-executor (all versions)rhosp-rhel8/openstack-nova-api (all versions)rhosp-rhel8/openstack-nova-compute-ironic (all versions)rhosp-rhel8/openstack-novajoin-base (all versions)rhosp-rhel8/openstack-novajoin-notifier (all versions)rhosp-rhel8/openstack-novajoin-server (all versions)rhosp-rhel8/openstack-tempest (all versions)rhosp-rhel8/openstack-tripleoclient (all versions)Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Connected by shared product, vendor, weakness, or advisory.
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