# Facebook vulnerabilities Source: https://junglewise.ai/threats/vendors/facebook Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/vendors/facebook.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 10 vulnerabilities in Facebook: 0 in the last 7 days and 4 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, Hydra legacy target blacklist permits unsafe PyYAML loading, was published on 27 October 2026. 1 vulnerability in the last four weeks, down 67% on the four before (3). 2 technologies have a page of their own. ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 4 - All time: 10 (0 critical, 0 exploited in the wild) ## About Facebook Technology company that develops social media and software platforms. ## Latest Facebook vulnerabilities - [Hydra legacy target blacklist permits unsafe PyYAML loading](https://junglewise.ai/threats/hydra-legacy-target-blacklist-permits-unsafe-pyyaml-loading-b82ea1ec) (high, CVSS 7.8, published 27 Oct 2026) - [CVE-2026-106442: Facebook Hydra instantiate target bypass vulnerability](https://junglewise.ai/threats/cve-2026-106442-hydra-is-a-framework-for-elegantly-configuring-complex) (high, CVSS 7.8, published 6 Oct 2026) - [CVE-2026-106439: Hydra instantiate execution policy bypass via mutable module-level state](https://junglewise.ai/threats/cve-2026-106439-hydra-is-a-framework-for-elegantly-configuring-complex) (high, CVSS 4, published 6 Oct 2026) - [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-2026-66705: Facebook for WordPress unauthenticated cross-site scripting](https://junglewise.ai/threats/cve-2026-66705-facebook-for-wordpress-unauthenticated-cross-site-scripting) (high, CVSS 7.1, published 6 Aug 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-2026-23870: Facebook React Denial of Service in React Server Components](https://junglewise.ai/threats/cve-2026-23870-facebook-react-denial-of-service-in-react-server-components) (high, CVSS 7.5, published 6 May 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) - [React Cross-Site Scripting in createElement](https://junglewise.ai/threats/react-cross-site-scripting-in-createelement-6e7de634) (info, published 4 Sep 2020) - [CVE-2018-6341: Facebook react-dom cross-site scripting in server rendering](https://junglewise.ai/threats/cve-2018-6341-facebook-react-dom-cross-site-scripting-in-server-rendering) (low, CVSS 3, published 4 Jan 2019) ## Most severe Facebook vulnerabilities - [CVE-2026-106442: Facebook Hydra instantiate target bypass vulnerability](https://junglewise.ai/threats/cve-2026-106442-hydra-is-a-framework-for-elegantly-configuring-complex) (high, CVSS 7.8, published 6 Oct 2026) - [Hydra legacy target blacklist permits unsafe PyYAML loading](https://junglewise.ai/threats/hydra-legacy-target-blacklist-permits-unsafe-pyyaml-loading-b82ea1ec) (high, CVSS 7.8, published 27 Oct 2026) - [CVE-2026-23870: Facebook React Denial of Service in React Server Components](https://junglewise.ai/threats/cve-2026-23870-facebook-react-denial-of-service-in-react-server-components) (high, CVSS 7.5, published 6 May 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-2026-66705: Facebook for WordPress unauthenticated cross-site scripting](https://junglewise.ai/threats/cve-2026-66705-facebook-for-wordpress-unauthenticated-cross-site-scripting) (high, CVSS 7.1, published 6 Aug 2026) - [CVE-2026-106439: Hydra instantiate execution policy bypass via mutable module-level state](https://junglewise.ai/threats/cve-2026-106439-hydra-is-a-framework-for-elegantly-configuring-complex) (high, CVSS 4, published 6 Oct 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-2018-6341: Facebook react-dom cross-site scripting in server rendering](https://junglewise.ai/threats/cve-2018-6341-facebook-react-dom-cross-site-scripting-in-server-rendering) (low, CVSS 3, published 4 Jan 2019) - [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) - [React Cross-Site Scripting in createElement](https://junglewise.ai/threats/react-cross-site-scripting-in-createelement-6e7de634) (info, published 4 Sep 2020) ## Vulnerabilities per week 1 vulnerability in the last four weeks, down 67% on the four before (3). | 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 | 2 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 1 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Facebook technologies - [Facebook Hydra](https://junglewise.ai/threats/technologies/facebook-hydra): 3 vulnerabilities - [Facebook Proxygen](https://junglewise.ai/threats/technologies/proxygen): 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 vulnerabilities", https://junglewise.ai/threats/vendors/facebook, 9 November 2026.