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CVE-2026-115385medium6.9

Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 Host Panic via WASIp3 Timestamps

Impact

Wasmtime versions 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contain a denial of service vulnerability. Guests with mutable preopened directory access can crash the host process by calling set-times or set-times-at with negative seconds timestamps. This triggers an assertion failure.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

bytecodealliance · VulnCheck

wasmtime

4 ranges
VulnCheck version evidence

Package identity

pkg:cargo/wasmtime-wasiExplore wasmtime-wasi →

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

46.0.0 → before 48.0.4

semver versions

49.0.0 → before 49.0.2

semver versions

unaffected

48.0.4

semver versions

49.0.2

semver versions

unknown

Other versions: unaffected

Original source description

Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a denial of service vulnerability in the wasmtime-wasi WASIp3 implementation that allows guests to abort the Unix host process. Guests with mutable preopened directory access can call set-times or set-times-at with negative seconds timestamps before the epoch, triggering an assertion failure that crashes the host.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-115385

View 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.

CWE-754 ↗

Improper Check for Unusual or Exceptional Conditions

VulnCheck

Related →

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:*:*:*:*:*:*:*:*

From (inclusive): 46.0.0

Before: 48.0.4

Vulnerable product

cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*

From (inclusive): 49.0.0

Before: 49.0.2

Original applicability statements
[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "46.0.0",
            "versionEndExcluding": "48.0.4"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "49.0.0",
            "versionEndExcluding": "49.0.2"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 2
VulnCheck

Assigning organization

2026-10-22
CISA-ADP

Additional data publisher

2026-10-26

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.

References

2 sources
github.com/bytecodealliance/wasmtime/security/advisories/GHSA-mr2v-56j5-cmfc
vendor-advisoryVulnCheck
www.vulncheck.com/advisories/wasmtime-46.0.0-before-48.0.4-and-49.0.0-before-49.0.2-host-panic-via-wasip3-timestamps
third-party-advisoryVulnCheck