CVE-2018-18854
Uncontrolled Resource Consumption in spray-json
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).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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).
- Record
CVE-2018-18854- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-400
- Updated
- 2026-11-02
CVE List No score
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).
- Record
CVE-2018-18854- Updated
- 2026-11-02
EUVDEUVD-2018-0769 No score
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).
- Record
EUVD-2018-0769- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q8xj-8xg3-w432
Uncontrolled Resource Consumption in spray-json
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).
- Record
GHSA-q8xj-8xg3-w432- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSV
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).
- Record
CVE-2018-18854- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-q8xj-8xg3-w432
Uncontrolled Resource Consumption in spray-json
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).
- Record
GHSA-q8xj-8xg3-w432- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
io.spray:spray-json_2.12Maven |
before 1.3.5 | 1.3.5 |
io.spray:spray-json_2.11Maven |
before 1.3.5 | 1.3.5 |
io.spray:spray-json_2.10Maven |
before 1.3.5 | 1.3.5 |
io.spray:spray-json_2.12Maven |
before 1.3.5, plus listed versions 1.3.21.3.31.3.4 |
1.3.5 |
io.spray:spray-json_2.11Maven |
before 1.3.5, plus listed versions 1.2.61.3.01.3.11.3.21.3.31.3.4 |
1.3.5 |
io.spray:spray-json_2.10Maven |
before 1.3.5, plus listed versions 1.2.51.2.61.3.01.3.11.3.21.3.31.3.4 |
1.3.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-18854 is a high vulnerability (CVSS 7.5) in Lightbend Spray-json, published October 31, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.90%, the 79th percentile. Fixed in io.spray:spray-json_2.12 1.3.5.