CVE-2026-0933 (GCVE-0-2026-0933)
Vulnerability from cvelistv5 – Published: 2026-01-20 22:58 – Updated: 2026-01-23 21:54
VLAI
EPSS
VEX
Title
OS Command Injection in `wrangler pages deploy`
Summary
SummaryA command injection vulnerability (CWE-78) has been found to exist in the `wrangler pages deploy` command. The issue occurs because the `--commit-hash` parameter is passed directly to a shell command without proper validation or sanitization, allowing an attacker with control of `--commit-hash` to execute arbitrary commands on the system running Wrangler.
Root causeThe commitHash variable, derived from user input via the --commit-hash CLI argument, is interpolated directly into a shell command using template literals (e.g., execSync(`git show -s --format=%B ${commitHash}`)). Shell metacharacters are interpreted by the shell, enabling command execution.
ImpactThis vulnerability is generally hard to exploit, as it requires --commit-hash to be attacker controlled. The vulnerability primarily affects CI/CD environments where `wrangler pages deploy` is used in automated pipelines and the
--commit-hash parameter is populated from external, potentially untrusted sources. An attacker could exploit this to:
* Run any shell command.
* Exfiltrate environment variables.
* Compromise the CI runner to install backdoors or modify build artifacts.
Credits Disclosed responsibly by kny4hacker.
Mitigation
* Wrangler v4 users are requested to upgrade to Wrangler v4.59.1 or higher.
* Wrangler v3 users are requested to upgrade to Wrangler v3.114.17 or higher.
* Users on Wrangler v2 (EOL) should upgrade to a supported major version.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-23 18:58 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cloudflare | Wrangler |
Affected:
v3.0.0 , ≤ v3.114.16
(semver)
Affected: v4.0.0 , ≤ v4.59.0 (semver) Affected: v2.0.15+ |
guessed |
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"value": "\u003ch2\u003e\u003cspan style=\"background-color: transparent;\"\u003e\u003cb\u003eSummary\u003c/b\u003e\u003c/span\u003e\u003c/h2\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eA command injection vulnerability (CWE-78) has been found to exist in the `wrangler pages deploy` command. The issue occurs because the `--commit-hash` parameter is passed directly to a shell command without proper validation or sanitization, allowing an attacker with control of `--commit-hash` to execute arbitrary commands on the system running Wrangler.\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003e\u003cbr\u003e\u003c/span\u003e\u003c/p\u003e\u003ch3\u003e\u003cspan style=\"background-color: transparent;\"\u003e\u003cb\u003eRoot cause\u003c/b\u003e\u003c/span\u003e\u003c/h3\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eThe \u003c/span\u003e\u003cspan style=\"background-color: rgb(233, 238, 246);\"\u003ecommitHash\u003c/span\u003e\u003cspan style=\"background-color: transparent;\"\u003e variable, derived from user input via the --commit-hash \u003c/span\u003e\u003cspan style=\"background-color: transparent;\"\u003eCLI argument, is interpolated directly into a shell command using template literals (e.g., \u0026nbsp;\u003cspan style=\"background-color: rgb(233, 238, 246);\"\u003eexecSync(`git show -s --format=%B ${commitHash}`)\u003c/span\u003e\u003cspan style=\"background-color: transparent;\"\u003e)\u003c/span\u003e\u003c/span\u003e\u003cspan style=\"background-color: transparent;\"\u003e. Shell metacharacters are interpreted by the shell, enabling command execution.\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003e\u003cbr\u003e\u003c/span\u003e\u003c/p\u003e\u003ch3\u003e\u003cspan style=\"background-color: transparent;\"\u003e\u003cb\u003eImpact\u003c/b\u003e\u003c/span\u003e\u003c/h3\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eThis vulnerability is generally hard to exploit, as it requires --commit-hash to be attacker controlled. The vulnerability primarily affects CI/CD environments where `wrangler pages deploy` is used in automated pipelines and the \u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003e--commit-hash\u003c/span\u003e\u003cspan style=\"background-color: transparent;\"\u003e\u0026nbsp;parameter is populated from external, potentially untrusted sources. An attacker could exploit this to:\u003c/span\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003e\u003cspan style=\"background-color: transparent;\"\u003eRun any shell command.\u003c/span\u003e\u003c/li\u003e\u003cli\u003eExfiltrate environment variables.\u003c/li\u003e\u003cli\u003eCompromise the CI runner to install backdoors or modify build artifacts.\u003c/li\u003e\u003c/ul\u003e\u003cbr\u003e\u003ch3\u003e\u003cspan style=\"background-color: transparent;\"\u003e\u003cb\u003eCredits\u003c/b\u003e\u003c/span\u003e\u003c/h3\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003e Disclosed responsibly by \u003c/span\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003ekny4hacker.\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c/span\u003e\u003c/p\u003e\u003ch3\u003eMitigation\u003cbr\u003e\u003c/h3\u003e\u003cul\u003e\u003cli\u003e\u003cspan style=\"background-color: transparent;\"\u003eWrangler v4 users are requested to upgrade to Wrangler v4.59.1 or higher.\u003c/span\u003e\u003c/li\u003e\u003cli\u003eWrangler v3 users are requested to upgrade to \u003cspan style=\"background-color: transparent;\"\u003eWrangler v3.114.17 or higher.\u003c/span\u003e\u003c/li\u003e\u003cli\u003eUsers on Wrangler v2 (EOL) should upgrade to a supported major version.\u003c/li\u003e\u003c/ul\u003e\u003cbr\u003e\u003cbr\u003e"
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"value": "SummaryA command injection vulnerability (CWE-78) has been found to exist in the `wrangler pages deploy` command. The issue occurs because the `--commit-hash` parameter is passed directly to a shell command without proper validation or sanitization, allowing an attacker with control of `--commit-hash` to execute arbitrary commands on the system running Wrangler.\n\n\n\n\nRoot causeThe commitHash variable, derived from user input via the --commit-hash CLI argument, is interpolated directly into a shell command using template literals (e.g., \u00a0execSync(`git show -s --format=%B ${commitHash}`)). Shell metacharacters are interpreted by the shell, enabling command execution.\n\n\n\n\nImpactThis vulnerability is generally hard to exploit, as it requires --commit-hash to be attacker controlled. The vulnerability primarily affects CI/CD environments where `wrangler pages deploy` is used in automated pipelines and the \n\n--commit-hash\u00a0parameter is populated from external, potentially untrusted sources. An attacker could exploit this to:\n\n * Run any shell command.\n * Exfiltrate environment variables.\n * Compromise the CI runner to install backdoors or modify build artifacts.\n\n\n\nCredits Disclosed responsibly by kny4hacker.\n\n\n\n\nMitigation\n * Wrangler v4 users are requested to upgrade to Wrangler v4.59.1 or higher.\n * Wrangler v3 users are requested to upgrade to Wrangler v3.114.17 or higher.\n * Users on Wrangler v2 (EOL) should upgrade to a supported major version."
}
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"cvssV4_0": {
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"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
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"format": "CVSS",
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"lang": "en",
"value": "GENERAL"
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"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20 Improper Input Validation",
"lang": "en",
"type": "CWE"
}
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"providerMetadata": {
"dateUpdated": "2026-01-20T22:58:05.212Z",
"orgId": "a22f1246-ba21-4bb4-a601-ad51614c1513",
"shortName": "cloudflare"
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"references": [
{
"url": "https://github.com/cloudflare/workers-sdk"
}
],
"source": {
"discovery": "UNKNOWN"
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"title": "OS Command Injection in `wrangler pages deploy`",
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"assignerOrgId": "a22f1246-ba21-4bb4-a601-ad51614c1513",
"assignerShortName": "cloudflare",
"cveId": "CVE-2026-0933",
"datePublished": "2026-01-20T22:58:05.212Z",
"dateReserved": "2026-01-14T08:27:27.244Z",
"dateUpdated": "2026-01-23T21:54:58.842Z",
"state": "PUBLISHED"
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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