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CVE-2026-84895

Quick assessment

Affected
Facebook proxygen
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 ProxyGen 的 v2026.04.06.00 至 v2026.09.28.00 版本中， 方法在调用基类 之后，继续访问其自身的成员字段。而基类方法会通知会话处理器，后者可能会释放对该会话的最后一个引用，从而导致该会话对象被销毁。

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I. Basic Information for CVE-2026-84895

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method. The base method notifies the session handler, which may release the last reference to the session and destroy it.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Facebook proxygen v2026.04.06.00 ~ v2026.09.28.00 -

II. Public POCs for CVE-2026-84895

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III. Intelligence Information for CVE-2026-84895

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Other References for CVE-2026-84895 (2)

Same Patch Batch · Facebook · 2026-09-28 · 3 CVEs total

CVE-2026-91095 Proxygen v2024.10.28.0至v2026.09.28.00内存释放后使用漏洞
CVE-2026-91096 Proxygen 2024.10-2026.09 远程代码执行

IV. Related Vulnerabilities

Same product: proxygen
Same vendor: Facebook

V. Comments for CVE-2026-84895

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