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Vulnerabilities

Vulnerability · CVE-2025-14956

A vulnerability was determined in WebAssembly Binaryen up to 125.

Published Dec 19, 2025 · catalog updated Nov 3, 2026 · A vulnerability was determined

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-14956. EPSS is 0.21%. Act only if a listed version of A vulnerability was determined is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A vulnerability was determined).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.21%
Remediation
Advisory link
Affected products
Debian:12 binaryen · Debian:13 binaryen · Debian:14 binaryen

A vulnerability was determined in WebAssembly Binaryen up to 125. Affected by this issue is the function WasmBinaryReader::readExport of the file src/wasm/wasm-binary.cpp. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Patch name: 4f52bff8c4075b5630422f902dd92a0af2c9f398. It is recommended to apply a patch to fix this issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 binaryen108-1, 112-1, 116-1
  • Debian:13 binaryen120-4, 120-4+ports, 122-1.1
  • Debian:14 binaryen0 → 130-2

How to fix CVE-2025-14956

  • Upgrade

    CVE-2025-14956 lists a fix boundary at 130-2. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 120-4 · 2 other packages on the advisory

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-14956. EPSS is 0.21%. Act only if a listed version of A vulnerability was determined is installed.

Which versions are affected?

Compare what you have installed with 108-1, 112-1, 116-1, 120-4, 120-4+ports, 122-1.1, 0 → 130-2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.21%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 19, 2025 · Trivy Vulnerability DB

    Detected

    A vulnerability was determined in WebAssembly Binaryen up to 125. Affected by this issue is the function WasmBinaryReader::readExport of the file src/wasm/wasm-binary.cpp. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Patch name: 4f52bff8c4075b5630422f902dd92a0af2c9f398. It is

  2. Nov 3, 2026 · Trivy Vulnerability DB

    Fix available

    binaryen fixed in 130-2

  3. Nov 3, 2026 · Trivy Vulnerability DB

    Fix available

    binaryen fixed in 130-2

  4. Nov 3, 2026 · Trivy Vulnerability DB

    Updated

    A vulnerability was determined in WebAssembly Binaryen up to 125. Affected by this issue is the function WasmBinaryReader::readExport of the file src/wasm/wasm-binary.cpp. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Patch name: 4f52bff8c4075b5630422f902dd92a0af2c9f398. It is

Sources

  • CVE.orgVulnerability recordCVE-2025-14956

    Official CVE identifier

    cve.org
  • Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2025-14956

    A vulnerability was determined in WebAssembly Binaryen up to 125. Affected by this issue is the function WasmBinaryReader::readExport of the file src/wasm/wasm-binary.cpp. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host.

    osv.dev

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Trivy Vulnerability DBNov 3, 2026