CVE-2026-34206

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Source
https://cve.org/CVERecord?id=CVE-2026-34206
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34206.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-34206
Aliases
  • GHSA-ph62-4j5g-2q4r
Published
2026-03-31T19:34:21.383Z
Modified
2026-04-02T13:41:39.361235Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
Captcha Protect: Reflected XSS in challenge page via unsanitized destination rendered with text/template
Details

Captcha Protect is a Traefik middleware to add an anti-bot challenge to individual IPs in a subnet when traffic spikes are detected from that subnet. Prior to version 1.12.2, a reflected cross-site scripting (XSS) vulnerability exists in github.com/libops/captcha-protect. The challenge page accepted a client-supplied destination value and rendered it into HTML using Go's text/template. Because text/template does not perform contextual HTML escaping, an attacker could supply a crafted destination value that breaks out of the hidden input attribute and injects arbitrary script into the challenge page. This issue has been patched in version 1.12.2.

Database specific 
{
    "cwe_ids": [
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34206.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/libops/captcha-protect

Affected ranges

Type
GIT
Repo
https://github.com/libops/captcha-protect
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
eef6211ecd1147273be484d913b81c68c0bd8d3f
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.12.2"
        }
    ]
}

Affected versions

v0.*
v0.0.1
v0.0.2
v0.0.3
v0.0.4
v0.0.5
v0.1.0
v0.1.1
v0.1.2
v0.1.3
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v1.1.1
v1.1.2
v1.10.0
v1.10.1
v1.11.0
v1.11.1
v1.12.0
v1.12.1
v1.2.0
v1.2.1
v1.3.0
v1.3.1
v1.3.2
v1.4.0
v1.4.1
v1.5.0
v1.6.0
v1.6.1
v1.6.2
v1.7.0
v1.7.1
v1.8.0
v1.8.1
v1.8.2
v1.9.0
v1.9.1
v1.9.2
v1.9.3
v1.9.4
v1.9.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34206.json"