How severe is CVE-2019-7704?

CVE-2019-7704 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-2019-7704 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-7704?

CVE-2019-7704 affects Webassembly Binaryen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-7704?

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

When was CVE-2019-7704 published?

CVE-2019-7704 was published on 2019-02-10 and last updated on 2026-06-17.

CVE-2019-7704

CVE-2019-7704 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-770.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Webassembly Binaryen
Published: 2019-02-10
Last modified: 2026-06-17

Description

wasm::WasmBinaryBuilder::readUserSection in wasm-binary.cpp in Binaryen 1.38.22 triggers an attempt at excessive memory allocation, as demonstrated by wasm-merge and wasm-opt.

Frequently asked questions

What is CVE-2019-7704?: wasm::WasmBinaryBuilder::readUserSection in wasm-binary.cpp in Binaryen 1.38.22 triggers an attempt at excessive memory allocation, as demonstrated by wasm-merge and wasm-opt.
How severe is CVE-2019-7704?: CVE-2019-7704 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-2019-7704 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-7704?: CVE-2019-7704 affects Webassembly Binaryen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-7704?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-7704 published?: CVE-2019-7704 was published on 2019-02-10 and last updated on 2026-06-17.

References

https://github.com/WebAssembly/binaryen/issues/1866

Affected products (1)

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

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