CVE catalog
CVE-2026-8257
A vulnerability was detected in WebAssembly Binaryen up to 117. This issue affects the function IRBuilder::makeBrOn of the file src/wasm/wasm-ir-builder.cpp of the component BrOn Parser. Performing a
- Severity
- Medium · CVSS 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.16% · Oct 25, 2026
A vulnerability was detected in WebAssembly Binaryen up to 117. This issue affects the function IRBuilder::makeBrOn of the file src/wasm/wasm-ir-builder.cpp of the component BrOn Parser. Performing a manipulation results in reachable assertion. The attack needs to be approached locally. The exploit is now public and may be used. The patch is named 1251efbc1ea471c1311d2726b2bbe061ff2a291c. It is suggested to install a patch to address this issue.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | binaryen | sid | 131-2 | vulnerable |
| Debian | binaryen | forky | 131-2 | vulnerable |
| Debian | binaryen | trixie | 120-4 | vulnerable |
| Debian | binaryen | bookworm | 108-1 | vulnerable |
| Cpe | binaryen | Not reported | Not reported | vulnerable |
| Cpe | binaryen | Not reported | Not reported | unknown |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | binaryen | source | sid | (unfixed) | unimportant | Not reported | Not reported |
| Debian | binaryen | source | forky | (unfixed) | unimportant | Not reported | Not reported |
| Debian | binaryen | source | trixie | (unfixed) | unimportant | Not reported | Not reported |
| Debian | binaryen | source | bookworm | (unfixed) | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [binaryen]Affected
Details (2)
108-1· amd64 · bookwormAffected
nvd · binaryen · debian · bookworm; nvd · binaryen · debian · 12
108-1· arm64 · bookwormAffected
nvd · binaryen · debian · bookworm; nvd · binaryen · debian · 12
[Debian 13 (Trixie)]
- [binaryen]Affected
Details (2)
120-4· amd64 · trixieAffected
nvd · binaryen · debian · 13
120-4· arm64 · trixieAffected
nvd · binaryen · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11915-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-8257]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-8257]
- [https://security-tracker.debian.org/tracker/CVE-2026-8257]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8257.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]