F5 patched a critical nginx vulnerability that lets a remote, unauthenticated attacker trigger a heap buffer overflow in the worker process with crafted HTTP requests. CVE-2026-42533 sits in nginx's script engine, the code that builds strings from configuration directives at request time, and only surfaces under a specific configuration: a regex based map whose output is referenced in a string expression after an earlier regex capture. Under that pattern the engine's two pass evaluation disagrees on buffer size. Triggering it crashes or restarts the worker, and F5 says code execution may be possible where address randomization is disabled or bypassed. Fixes shipped July 15.
Attackers have started probing a critical flaw in Gitea's official Docker images, the self-hosted Git service used by many development teams. The images shipped a configuration that trusted the X-WEBAUTH-USER header from any source address, so with reverse-proxy login enabled, anyone who could reach the port could send that header and be authenticated as any user, no password required. Tracked as CVE-2026-20896 and rated 9.8, it was fixed in version 1.26.3 late last month, which removes the wildcard and makes reverse-proxy authentication opt-in. Sysdig reported the first exploitation attempt 13 days after disclosure, so far just reconnaissance, against some of the roughly 6,200 internet-facing Gitea instances.
TrustStrike Labs