CVE-2026-119141 (GCVE-0-2026-119141)

Vulnerability from cvelistv5 – Published: 2026-10-29 15:58 – Updated: 2026-10-29 17:14
VLAI
Title
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via realloc
Summary
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows malicious Wasm modules to panic the host because the may_leave flag is not cleared during realloc. Attackers can call into the host from realloc while lowering stream or future results, such as cancelling the active read or re-waiting a waitable-set, crashing the host.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-29 17:10 UTC
CWE
  • CWE-1265 - Unintended Reentrant Invocation of Non-reentrant Code Via Nested Calls
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7156 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
bytecodealliance wasmtime Affected: 46.0.0 , < 48.0.6 (semver)
Unaffected: 48.0.6 (semver)
Affected: 49.0.0 , < 49.0.3 (semver)
Unaffected: 49.0.3 (semver)
    cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*
    cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-10-14 00:00
Credits
tschneidereit
Show details on NVD website
To clipboard 

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