How severe is CVE-2018-18853?

CVE-2018-18853 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-18853 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18853?

CVE-2018-18853 affects Lightbend Spray-json. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18853?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-18853 published?

CVE-2018-18853 was published on 2018-10-31 and last updated on 2026-06-17.

CVE-2018-18853

CVE-2018-18853 is a high-severity vulnerability in Lightbend Spray-json with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Lightbend Spray-json
Published: 2018-10-31
Last modified: 2026-06-17

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 a field composed of many decimal digits.

Frequently asked questions

What is CVE-2018-18853?: 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 a field composed of many decimal digits.
How severe is CVE-2018-18853?: CVE-2018-18853 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-18853 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18853?: CVE-2018-18853 affects Lightbend Spray-json. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18853?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-18853 published?: CVE-2018-18853 was published on 2018-10-31 and last updated on 2026-06-17.

References

https://github.com/spray/spray-json/issues/278

Affected products (1)

cpe:2.3:a:lightbend:spray-json:*:*:*:*:*:*:*:*

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