Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 Unbounded Memory Growth via Component-Model Resource Handles
Impact
Wasmtime versions before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 have an unbounded memory growth weakness via component-model resource handles. This may be caused by allocation of resources without limits or throttling. The impact is uncertain.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Affected packages
Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.
| Affected range | Recorded fix |
|---|---|
| From 0.0.0-0 before 36.0.18Semantic versions | 36.0.18 |
| From 37.0.0 before 48.0.6Semantic versions | 48.0.6 |
| From 49.0.0 before 49.0.3Semantic versions | 49.0.3 |
Version evidence: OSV · RUSTSEC-2026-0363
View original version evidence (0 explicit versions)
Affected products
Vendor version evidence. Product records are separate from automatic dependency matching.
bytecodealliance · VulnCheck
wasmtime
6 ranges
bytecodealliance · VulnCheck
wasmtime
Package identity
pkg:cargo/wasmtimeExplore wasmtime →Identity supplied by VulnCheck. Version matching requires compatible range evidence.
Compare with this publisher’s ranges. This does not inspect your installation.
affected
0 → before 36.0.18
semver versions
37.0.0 → before 48.0.6
semver versions
49.0.0 → before 49.0.3
semver versions
unaffected
36.0.18
semver versions
48.0.6
semver versions
49.0.3
semver versions
Other versions: unaffected
Original source description
This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-q554-3cjc-rx7p For more information see the GitHub-hosted security advisory.
Inside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-119134View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Environment requirements
These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.
VulnCheck · platform conditions
Any condition may hold
Vulnerable product
cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*Before: 36.0.18
Vulnerable product
cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*From (inclusive): 37.0.0
Before: 48.0.6
Vulnerable product
cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*From (inclusive): 49.0.0
Before: 49.0.3
Original applicability statements
[
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*",
"versionEndExcluding": "36.0.18"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*",
"versionStartIncluding": "37.0.0",
"versionEndExcluding": "48.0.6"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*",
"versionStartIncluding": "49.0.0",
"versionEndExcluding": "49.0.3"
}
]
}
]
}
]Contributing organizations · 2
Assigning organization
Additional data publisher
What changed
Follow changes- CVE · CVE-2026-119134
Observed 2026-10-29T20:22:21.364Z · upstream updated 2026-10-29T20:14:16.506Z
Prioritization updated
before
[]
after
[ { "source": "CISA-ADP", "type": "SSVC", "role": "CISA Coordinator", "timestamp": "2026-10-29T20:14:05.502819Z", "decisions": [ { "name": "Exploitation", "value": "none" }, { "name": "Automatable", "value": "no" }, { "name": "Technical Impact", "value": "partial" } ] } ]
Large field values are marked as truncated previews. Original source snapshots remain retained.
Showing up to 50 most recent observed changes.