# Facebook Proxygen vulnerabilities

Source: https://junglewise.ai/threats/technologies/proxygen  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/proxygen.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Facebook Proxygen: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-84895, was published on 28 September 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 3 (0 critical, 0 exploited in the wild)

## About Facebook Proxygen

C++ library for building high-performance HTTP servers and clients.

## Latest Facebook Proxygen vulnerabilities

- [CVE-2026-84895: Facebook Proxygen use-after-free in QuicWtSession closeSession](https://junglewise.ai/threats/cve-2026-84895-in-proxygen-from-v2026-04-06-00-until-v2026-09-28-00) (info, published 28 Sep 2026)
- [CVE-2026-44909: Facebook Proxygen denial of service via slow-consumer memory exhaustion](https://junglewise.ai/threats/cve-2026-44909-facebook-proxygen-denial-of-service-via-slow-consumer-memory) (high, CVSS 7.5, published 23 Jul 2026)
- [CVE-2025-55181: Sending an HTTP request/response body with greater than 2^31 bytes triggers an infinite loop in…](https://junglewise.ai/threats/cve-2025-55181-sending-an-http-request-response-body-with-greater-than-2-31) (medium, CVSS 5.3, published 2 Dec 2025)

## Most severe Facebook Proxygen vulnerabilities

- [CVE-2026-44909: Facebook Proxygen denial of service via slow-consumer memory exhaustion](https://junglewise.ai/threats/cve-2026-44909-facebook-proxygen-denial-of-service-via-slow-consumer-memory) (high, CVSS 7.5, published 23 Jul 2026)
- [CVE-2025-55181: Sending an HTTP request/response body with greater than 2^31 bytes triggers an infinite loop in…](https://junglewise.ai/threats/cve-2025-55181-sending-an-http-request-response-body-with-greater-than-2-31) (medium, CVSS 5.3, published 2 Dec 2025)
- [CVE-2026-84895: Facebook Proxygen use-after-free in QuicWtSession closeSession](https://junglewise.ai/threats/cve-2026-84895-in-proxygen-from-v2026-04-06-00-until-v2026-09-28-00) (info, published 28 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 1 vulnerability in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 1 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Facebook technologies

- [Facebook Hydra](https://junglewise.ai/threats/technologies/facebook-hydra): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Facebook Proxygen vulnerabilities", https://junglewise.ai/threats/technologies/proxygen, 9 November 2026.