CVE-2026-119137Suited to automated attack · CISA

Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Stack Overflow via Type Registry

CVSS score

6.9

EPSS probability

—

Risk score

0.7

Published

5 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Wasmtime Type Registry Stack Overflow Vulnerability

Sources read

Source agreement

0/2

Evidence confidence

%44

Short explanation

CVE-2026-119137 is a stack overflow vulnerability in Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3, allowing guests to crash the host via recursive type drops.

Why does it matter?

This vulnerability allows guests to trigger denial of service conditions by exhausting the host stack through recursive type registry drops.

What should be done?

Follow vendor advisories for updates
Update affected Wasmtime versions
Review security advisories

Note on uncertainty

2 alanda kaynak uyuşmazlığı var. DayBreach bu değerleri saklamadı; kaynak karşılaştırması aşağıda gösteriliyor.

Chain of evidence and sources2 verified claims

Wasmtime 42.0.0 - 48.0.6 öncesi ve 49.0.0 - 49.0.3 öncesi sürümler yığın taşması açığı barındırmaktadır.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

Konuklar, ana sistemin yığınını tüketmek için özyinelemeli tür düşüşlerini kullanabilir.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

Show the technical text from the sources

Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a stack overflow vulnerability that allows guests to crash the host through recursive type drops. Guests can define a long chain of recursive types so that removing the top-level type triggers unbounded recursive drops, exhausting the host stack.

CVSS vector: 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

CWE: CWE-674

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-119137 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	bytecodealliance	wasmtime	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
6.9	CVSS V4_0	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	CVE CNA
6.9	CVSS V40	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD
5.3	CVSS V3_1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	CVE CNA
5.3	CVSS V31	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-119137 is associated with the following CWEs:

CWE-674: Common Weakness Enumeration Entry CWE-674

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-119137 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

GitHub Security Advisory (GHSA-wjc8-633q-pwxr)vendor-advisory VulnCheck Advisory: Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Stack Overflow via Type Registryvendor-advisory

CVSS Vector Radar Chart

6.9 / 10

Vulnerability Scoring Details

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

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)Low

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

bytecodealliance

Weakness Type (CWE & CAPEC)

CWE-674

Similar Vulnerabilities

6.9

CVE-2026-119141Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via realloc

Vendorbytecodealliance Productwasmtime

Patch status unknown5 h ago

6.9

CVE-2026-119134Wasmtime 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

Vendorbytecodealliance Productwasmtime

Patch status unknown5 h ago

6.9

CVE-2026-119131Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via wasi-http

Vendorbytecodealliance Productwasmtime

Patch status unknown5 h ago

5.9

CVE-2026-119143Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Panic via Zero-Length Stream Writes

Vendorbytecodealliance Productwasmtime

Patch status unknown5 h ago

5.9

CVE-2026-119142Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via call_async Drop

Vendorbytecodealliance Productwasmtime

Patch status unknown5 h ago

5.9

CVE-2026-119140Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via thread.yield

Vendorbytecodealliance Productwasmtime

Patch status unknown5 h ago

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free key Documentation

curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-119137"

Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Stack Overflow via Type Registry

Impact on My Inventory

Vulnerability description

DayBreach AI Explanation

Short explanation

What should be done?

IMPACT: Affected Products and Software

Affected Products

RED HAT CSAF/VEX: Product Impact Check

SCORING: CVSS from Multiple Sources

CVSS Scores

Patch and Remediation Guide

Solution & Remediation Advisory

Public exploit and active exploitation status

Verified exploit intelligence

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

Common Attack Pattern Enumeration and Classification (CAPEC)

Attack Vector and Accessibility

Official Sources and Advisories

CVSS Vector Radar Chart

Vulnerability Scoring Details

Weakness Type (CWE & CAPEC)

Similar Vulnerabilities

Get this vulnerability through the API

DayBreach

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