CVE-2026-40975
MEDIUMCVE-2026-40975 is a medium-severity (CVSS 4.8) Insufficient Random Values vulnerability in org.springframework.boot:spring-boot-cassandra. O3 Security confirms whether CVE-2026-40975 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Spring Boot's random value property source uses a weak PRNG unsuitable for secrets
Real-World Exposure
org.springframework.boot:spring-boot-cassandra☕org.springframework.boot:spring-boot-cassandra☕org.springframework.boot:spring-boot-cassandra☕org.springframework.boot:spring-boot-cassandra☕org.springframework.boot:spring-boot-cassandraReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
Values produced by ${random.value} are not suitable for use as secrets. ${random.uuid} is not affected. ${random.int} and ${random.long} should never be used for secrets as they are numeric values with a predictable range.
Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19), 2.7.0–2.7.32 (fix 2.7.33); random value property source / weak PRNG for secrets. Versions that are no longer supported are also affected per vendor advisory.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.springframework.boot:spring-boot-cassandra | ≥ 4.0.0&&< 4.0.6 | 4.0.6 |
| ☕Maven | org.springframework.boot:spring-boot-cassandra | ≥ 3.5.0&&< 3.5.14 | 3.5.14 |
| ☕Maven | org.springframework.boot:spring-boot-cassandra | ≥ 3.4.0 | No fix |
| ☕Maven | org.springframework.boot:spring-boot-cassandra | ≥ 3.3.0 | No fix |
| ☕Maven | org.springframework.boot:spring-boot-cassandra | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.springframework.boot:spring-boot-cassandra. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update org.springframework.boot:spring-boot-cassandra to 4.0.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-40975 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2026-40975 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2026-40975. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-40975 in your dependencies?
O3 detects CVE-2026-40975 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.