How severe is CVE-2019-15758?

CVE-2019-15758 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-15758 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-15758?

CVE-2019-15758 affects Webassembly Binaryen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-15758?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-15758 published?

CVE-2019-15758 was published on 2019-08-29 and last updated on 2026-06-17.

CVE-2019-15758

CVE-2019-15758 is a medium-severity vulnerability in Webassembly Binaryen with a CVSS 3.x base score of 6.5. 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-617.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-617
Affected product: Webassembly Binaryen
Published: 2019-08-29
Last modified: 2026-06-17

Description

An issue was discovered in Binaryen 1.38.32. Missing validation rules in asmjs/asmangle.cpp can lead to an Assertion Failure at wasm/wasm.cpp in wasm::asmangle. A crafted input can cause denial-of-service, as demonstrated by wasm2js.

Frequently asked questions

What is CVE-2019-15758?: An issue was discovered in Binaryen 1.38.32. Missing validation rules in asmjs/asmangle.cpp can lead to an Assertion Failure at wasm/wasm.cpp in wasm::asmangle. A crafted input can cause denial-of-service, as demonstrated by wasm2js.
How severe is CVE-2019-15758?: CVE-2019-15758 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-15758 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-15758?: CVE-2019-15758 affects Webassembly Binaryen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-15758?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-15758 published?: CVE-2019-15758 was published on 2019-08-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:webassembly:binaryen:*:*:*:*:*:*:*:*

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