How severe is CVE-2019-15550?

CVE-2019-15550 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-2019-15550 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-15550?

CVE-2019-15550 affects Simdjson Project Simdjson. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-15550?

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-2019-15550 published?

CVE-2019-15550 was published on 2019-08-26 and last updated on 2026-06-17.

CVE-2019-15550

CVE-2019-15550 is a high-severity vulnerability in Simdjson Project Simdjson 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-125.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Simdjson Project Simdjson
Published: 2019-08-26
Last modified: 2026-06-17

Description

An issue was discovered in the simd-json crate before 0.1.15 for Rust. There is an out-of-bounds read and an incorrect crossing of a page boundary.

Frequently asked questions

What is CVE-2019-15550?: An issue was discovered in the simd-json crate before 0.1.15 for Rust. There is an out-of-bounds read and an incorrect crossing of a page boundary.
How severe is CVE-2019-15550?: CVE-2019-15550 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-2019-15550 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-15550?: CVE-2019-15550 affects Simdjson Project Simdjson. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-15550?: 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-2019-15550 published?: CVE-2019-15550 was published on 2019-08-26 and last updated on 2026-06-17.

References

https://rustsec.org/advisories/RUSTSEC-2019-0008.html

Affected products (1)

cpe:2.3:a:simdjson_project:simdjson:*:*:*:*:*:*:*:*

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