CVE-2026-28318 — SolarWinds Serv-U HTTP Deflate Uncontrolled Resource Consumption

Bishop Fox confirms CVE-2026-28318: one unauthenticated POST with a deflate Content-Encoding crashes SolarWinds Serv-U via heap corruption, but three probed RCE paths dead-end; HF1 fixes it.

SolarWinds Serv-U MFT 15.1.6.25 issues low-entropy integer session tokens usable in URLs; a brute-forced value hijacks sessions after only 4,780 guesses (CVE-2018-10240).

Denial of service in SolarWinds Serv-U 15.1.6.25: an authenticated user swaps Login.xml for a crafted value to trigger a NULL pointer dereference and crash the server (CVE-2018-10241).

James Kettle shows how web cache poisoning can take down websites with a single request without collateral damage, earning bounties from Tesla and HackerOne along the way.

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Bishop Fox on CVE-2026-82329: a default Artifactory cluster join key anyone can derive, so one forged join request mints an admin token — CVSS 9.8, KEV-listed, fixed in 7.111.21.