CVE catalog
CVE-2026-48818
Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and earlier, StaticFiles on Windows is vulnerable to SSRF. An UNC path such as \\attacker.com\share can cause os.path.realpath to i
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.37% · Oct 25, 2026
Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and earlier, StaticFiles on Windows is vulnerable to SSRF. An UNC path such as \\attacker.com\share can cause os.path.realpath to initiate an outbound SMB connection before the path is rejected, exposing the service account’s NTLMv2 credentials for offline cracking or relay even though the HTTP response is only a 404. The issue affects default follow_symlink=False deployments, including frameworks built on Starlette such as FastAPI; POSIX systems and follow_symlink=True are unaffected. The issue is fixed in 1.1.0.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | starlette | sid | 1.9.0-1 | not affected |
| Debian | starlette | forky | 1.9.0-1 | not affected |
| Debian | starlette | trixie | 0.46.1-3+deb13u3 | not affected |
| Debian | starlette | trixie-security | 0.46.1-3+deb13u3 | not affected |
| Debian | starlette | bookworm | 0.26.1-1+deb12u1 | not affected |
| Debian | starlette | bookworm-security | 0.26.1-1+deb12u2 | not affected |
| Cpe | starlette | Not reported | 1.1.0 | fixed |
| PyPI | starlette | Not reported | 1.1.0 | fixed |
| Opensuse | python-graphifyy | tumbleweed | 0.9.48-1.1 | fixed |
| Cpe | starlette | Not reported | 1.1.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | starlette | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | starlette | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | starlette | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | starlette | source | bookworm | Not affected | unimportant | Not reported | Not reported |
| Cpe | starlette | cpe | Not reported | 1.1.0 | Not reported | Not reported | Not reported |
| PyPI | starlette | PyPI | Not reported | 1.1.0 | Not reported | GHSA-WQP7-X3PW-XC5R | Not reported |
| Opensuse | python-graphifyy | rpm | tumbleweed | 0.9.48-1.1 | Not reported | OPENSUSE-SU-2026:11572-1 | Not reported |
| Cpe | starlette | cpe | Not reported | 1.1.0 | Not reported | NVD-CVE-2026-48818 | Not reported |
OpenFactory catalog packages
[openSUSE Tumbleweed]
- [python313-graphifyy]Unknown
Source package: [python-graphifyy]
Details (1)
0.9.52-1.1· noarch · tumbleweedUnknown · Fixed:
0.9.48-1.1Version impact unknown
nvd · python-graphifyy · opensuse · tumbleweed
- [python313-graphifyy-mcp]Unknown
Source package: [python-graphifyy]
Details (1)
0.9.52-1.1· noarch · tumbleweedUnknown · Fixed:
0.9.48-1.1Version impact unknown
nvd · python-graphifyy · opensuse · tumbleweed
- [python314-graphifyy]Unknown
Source package: [python-graphifyy]
Details (1)
0.9.52-1.1· noarch · tumbleweedUnknown · Fixed:
0.9.48-1.1Version impact unknown
nvd · python-graphifyy · opensuse · tumbleweed
- [python314-graphifyy-mcp]Unknown
Source package: [python-graphifyy]
Details (1)
0.9.52-1.1· noarch · tumbleweedUnknown · Fixed:
0.9.48-1.1Version impact unknown
nvd · python-graphifyy · opensuse · tumbleweed
[Debian 12 (Bookworm)]
- [python3-starlette]Not affected
Source package: [starlette]
Details (4)
0.26.1-1+deb12u1· all · bookwormNot affected
nvd · starlette · debian · bookworm
0.26.1-1+deb12u1· all · bookwormNot affected
nvd · starlette · debian · bookworm
0.26.1-1+deb12u2· all · bookworm-securityNot affected
nvd · starlette · debian · bookworm
0.26.1-1+deb12u2· all · bookworm-securityNot affected
nvd · starlette · debian · bookworm
Observed:
References
- [https://access.redhat.com/errata/RHSA-2026:30087]
- [https://access.redhat.com/errata/RHSA-2026:30088]
- [https://access.redhat.com/errata/RHSA-2026:30089]
- [https://access.redhat.com/security/cve/CVE-2026-48818]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2490020]
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11572-1.json]
- [https://github.com/Kludex/starlette/commit/fd53168a7767b6b55ba5af787fd88f49e33cabc5]
- [https://github.com/Kludex/starlette/pull/3287]
- [https://github.com/Kludex/starlette/releases/tag/1.1.0]
- [https://github.com/Kludex/starlette/security/advisories/GHSA-wqp7-x3pw-xc5r]
- [https://github.com/pypa/advisory-database/tree/main/vulns/starlette/PYSEC-2026-2281.yaml]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-48818]
- [https://osv.dev/vulnerability/GHSA-wqp7-x3pw-xc5r]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11572-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-48818]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48818.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]