CVE-2022-29188Network attack vector

SSRF via bracketed-host deny-list bypass

Published May 20, 2022 · Updated Apr 23, 2025

SSRF in Stripe Smokescreen before 0.0.4 allows remote attackers to reach deny-listed destinations through its HTTP proxy. The HTTP request path passes req.Host, including square brackets, to deny-list evaluation instead of extracting req.URL.Hostname(), so bracketed names evade exact hostname matching. Exploitation requires access to an HTTP proxy deployment with the target hostname on its global deny list; HTTPS CONNECT requests are unaffected.

CVSS severity5.3
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Stripe Smokescreen before 0.0.4 allows remote attackers to reach deny-listed destinations through its HTTP proxy. The HTTP request path passes req.Host, including square brackets, to deny-list evaluation instead of extracting req.URL.Hostname(), so bracketed names evade exact hostname matching. Exploitation requires access to an HTTP proxy deployment with the target hostname on its global deny list; HTTPS CONNECT requests are unaffected.

The record

CVE
CVE-2022-29188
Published
May 20, 2022
Updated
Apr 23, 2025
Vendor
Stripe
Product
Smokescreen
Classifications
CWE-918, T1090
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Stripe · Smokescreenversion=< 0.0.4

Published CVSS scores

6.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1090Proxy

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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