CVE-2026-91096 proxygen - Use After Free

proxygen v2024.10.28.00 to v2026.09.28.00 contains a use-after-free vulnerability caused by failure to unregister read callbacks for closed streams in WebTransportImpl::terminateSessionStreams, letting attackers cause memory corruption or crash, exploit requires no special privileges.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.26% chance of exploitation in 30 days
View the NVD record ↗

Details

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

Vendor fix

Update to version v2026.09.28.00 or later.

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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