CVE-2026-84895 proxygen - Use After Free

proxygen v2026.04.06.00 to v2026.09.28.00 contains a use after free caused by accessing member fields after base QuicWtSessionBase::closeSession call, letting attackers cause memory corruption or crash, exploit requires triggering session close.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.19% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Published
28 September 2026
Updated
15 October 2026
Weakness
CWE-416

Vendor fix

Update to a version later than v2026.09.28.00 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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