CVE-2026-100863

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Source
https://cve.org/CVERecord?id=CVE-2026-100863
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100863.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-100863
Aliases
  • GHSA-6rph-qqcv-jqh4
Published
2026-09-27T01:28:52Z
Modified
2026-09-28T03:30:53Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N CVSS Calculator
Summary
Heym before 0.0.91 SSRF via image fetching and IPv6 validation
Details

Heym versions 0.0.90 and earlier contain two server-side request forgery (SSRF) egress gaps, both remediated in app/services/ssrf_guard.py in 0.0.91. First, the LLM image-edit input loader (_load_image_bytes) fetched caller-controlled HTTP/HTTPS URLs with a bare httpx.get, applying only a scheme check and bypassing the egress-pinning HTTP client; because the workflow DSL supports "imageInput": "$userInput.body.imageUrl", a webhook or API caller can choose the fetch target when a workflow author uses that expression, allowing requests to loopback, RFC1918, and cloud metadata endpoints. Second, _is_public_address unwrapped only IPv4-mapped IPv6 addresses, so IPv6 transition forms — the NAT64 well-known prefix 64:ff9b::/96, deprecated IPv4-compatible ::x.x.x.x addresses, and 6to4 (2002::/16, classified as globally routable by Python 3.11.0 through 3.11.9) — could carry loopback, RFC1918, link-local, or cloud-metadata IPv4 destinations past both the initial URL validation and the dial-time IP pin. Version 0.0.91 routes the image loader through guard_http_url and the guarded client, evaluates NAT64 and IPv4-compatible addresses by their embedded IPv4 address, and refuses 64:ff9b:1::/48, 6to4, and Teredo (2001::/32) outright.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-918"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100863.json"
}
References

Affected packages

Git / github.com/heymrun/heym

Affected ranges

Type
GIT
Repo
https://github.com/heymrun/heym
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1267b7b6a02f88eb447a5d09057296c4fac54c67
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "0.0.91"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

0.*
0.0.70
0.0.71
0.0.73
Other
codex-pr-assets
opencode-pr-assets
v.*
v.0.0.49
v0.*
v0.0.1
v0.0.10
v0.0.11
v0.0.12
v0.0.13
v0.0.14
v0.0.15
v0.0.16
v0.0.17
v0.0.18
v0.0.19
v0.0.2
v0.0.20
v0.0.21
v0.0.22
v0.0.23
v0.0.24
v0.0.25
v0.0.26
v0.0.27
v0.0.29
v0.0.3
v0.0.30
v0.0.31
v0.0.32
v0.0.33
v0.0.34
v0.0.35
v0.0.36
v0.0.37
v0.0.38
v0.0.39
v0.0.4
v0.0.40
v0.0.41
v0.0.42
v0.0.43
v0.0.44
v0.0.45
v0.0.46
v0.0.47
v0.0.48
v0.0.5
v0.0.50
v0.0.51
v0.0.52
v0.0.53
v0.0.54
v0.0.55
v0.0.56
v0.0.57
v0.0.58
v0.0.59
v0.0.6
v0.0.60
v0.0.61
v0.0.62
v0.0.63
v0.0.64
v0.0.65
v0.0.66
v0.0.67
v0.0.68
v0.0.69
v0.0.7
v0.0.72
v0.0.74
v0.0.75
v0.0.76
v0.0.77
v0.0.78
v0.0.79
v0.0.8
v0.0.80
v0.0.81
v0.0.82
v0.0.83
v0.0.84
v0.0.85
v0.0.86
v0.0.87
v0.0.88
v0.0.89
v0.0.9
v0.0.90

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100863.json"