What’s Vulnerable › Products

Spring Reactor Core vulnerabilities

2 known vulnerabilities, 0 confirmed exploited in the wild (CISA KEV), 2 published in the last 12 months.

Check whether your Spring Reactor Core version is affected

Latest Spring Reactor Core vulnerabilities

• CVE-2026-47863 — Reactor Core bufferTimeout fair-backpressure pipeline permanently hangs when upstream delivers items during an active flush (CVSS 7.5)
• CVE-2026-47857 — Reactor Core windowTimeout fair-backpressure stream hang due to 20-bit index wrap-around (CVSS 5.9)