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HIGH severity

GHSA-q8xj-8xg3-w432 — spray-json_2.12

HIGH

GHSA-q8xj-8xg3-w432 is a high-severity (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in io.spray:spray-json_2.12. 1 public exploit reference exists, so weaponization risk is real. A fix is available for io.spray:spray-json_2.12 — see the affected versions and patch details below.

Uncontrolled Resource Consumption in spray-json

Also known asCVE-2018-18854
Published
Nov 9, 2018
Updated
Nov 8, 2023
Affected
3 pkgs
Patched
3 / 3
Exploits
1 known
Exploitation data as of Sep 25, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs79th percentile — riskier than 79% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

How urgent is this, really

GHSA-q8xj-8xg3-w432 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.

Where this sits among everything scored

Of 378,567 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.

Real-World Exposure

3 pkgs affected
☕io.spray:spray-json_2.12☕io.spray:spray-json_2.11☕io.spray:spray-json_2.10

Real-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

Lightbend Spray spray-json through 1.3.4 allows remote attackers to cause a denial of service (resource consumption) because of Algorithmic Complexity during the parsing of many JSON object fields (with keys that have the same hash code).

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenio.spray:spray-json_2.12all versions1.3.5io.spray:spray-json_2.12:1.3.5
☕Mavenio.spray:spray-json_2.11all versions1.3.5io.spray:spray-json_2.11:1.3.5
☕Mavenio.spray:spray-json_2.10all versions1.3.5io.spray:spray-json_2.10:1.3.5
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.spray:spray-json_2.12, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update io.spray:spray-json_2.12 to 1.3.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q8xj-8xg3-w432 is resolved across your whole dependency graph.

  3. 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.

  4. How O3 protects you

    O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-q8xj-8xg3-w432 can be triaged on real exposure rather than presence alone.

Tailored to GHSA-q8xj-8xg3-w432. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Lightbend Spray spray-json through 1.3.4 allows remote attackers to cause a denial of service (resource consumption) because of Algorithmic Complexity during the parsing of many JSON object fields (with keys that have the same hash code).
O3 Security · Impact-Aware SCA

Is GHSA-q8xj-8xg3-w432 in your dependencies?

O3 Security finds GHSA-q8xj-8xg3-w432 across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

GHSA-q8xj-8xg3-w432: spray-json_2 (High 7.5) | O3 Security