Uncontrolled Resource Consumption in spray-json

published 2018-10-31 8 y ago modified 2026-06-17 4 mo ago also GHSA-q8xj-8xg3-w432 , EUVD-2018-0769

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.9%; EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits: 0; none known

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).

Patch / fix

fixed in 3

maven io.spray:spray-json_2.12 1.3.5
maven io.spray:spray-json_2.11 1.3.5
maven io.spray:spray-json_2.10 1.3.5

Exploit prediction

1.90% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/spray/spray-json/issues/277 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	io.spray:spray-json_2.12	<1.3.5	1.3.5
maven	io.spray:spray-json_2.11	<1.3.5	1.3.5
maven	io.spray:spray-json_2.10	<1.3.5	1.3.5

Classification

Weakness

CWE-400 Uncontrolled Resource Consumption

References

github.com /spray/spray-json/issues/277
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2018-18854
advisory
github.com /advisories/GHSA-q8xj-8xg3-w432
advisory
github.com /spray/spray-jso
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary