DEBIAN-CVE-2026-47712
Dulwich is a pure-Python implementation of the Git file formats and protocols. Starting in version 0.24.0 and prior to version 1.2.5, dulwich.porcelain.format_patch(outdir=...) derives each patch filename from the commit's subject line. Prior to this fix, get_summary only replaced spaces with dashes - path separators (/, \), parent-directory components (..), and other filename-hostile characters (e.g. :) were preserved verbatim and passed straight into os.path.join(outdir, f"{i:04d}-{summary}.patch"). A malicious commit subject could therefore direct the generated patch file outside the requested outdir. This is fixed in Dulwich 1.2.5. Users should upgrade to 1.2.5 or later. dulwich.patch.get_summary now mirrors git's format_sanitized_subject: only `[A-Za-z0-9._]` are kept, runs of other characters collapse to a single -, consecutive . collapse to a single ., trailing ./- are stripped, and the result is length-limited. This makes the returned string safe to embed as a filename component, so format_patch can no longer be steered out of outdir via the commit subject. Until upgrading, callers that pass untrusted commits to porcelain.format_patch can use stdout=True and write the patch to a destination they control, rather than letting format_patch choose the filename; validate the chosen path before opening - e.g. compare os.path.realpath(returned_path) against os.path.realpath(outdir) and reject any patch whose resolved path is not inside outdir; and/or pre-screen commits and r
DEBIAN-CVE-2026-47712
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-47712
dulwich
Source reference: /affected/0/package/name
- Affected versions
- 0.21.2-1
Source reference:
/affected/0/versions0.21.5-1Source reference:
/affected/0/versions0.21.6-1Source reference:
/affected/0/versions0.22.5-1Source reference:
/affected/0/versions0.22.7-1Source reference:
/affected/0/versions0.22.7-2Source reference:
/affected/0/versions0.24.10-1Source reference:
/affected/0/versions0.24.2-1Source reference:
/affected/0/versions0.24.2-2Source reference:
/affected/0/versions1.0.0-1Source reference:
/affected/0/versions1.0.0-2Source reference:
/affected/0/versions1.1.0-1Source reference:
/affected/0/versions1.1.0-2Source reference:
/affected/0/versions1.1.0-3Source reference:
/affected/0/versions1.2.0-1Source reference:
/affected/0/versions1.2.1-1Source reference:
/affected/0/versions1.2.11-1Source reference:
/affected/0/versions1.2.12-1Source reference:
/affected/0/versions1.2.5-1Source reference:
/affected/0/versions1.2.7-1Source reference:
/affected/0/versions1.2.7-2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
dulwich
Source reference: /affected/1/package/name
- Affected versions
- 0.22.7-1
Source reference:
/affected/1/versions0.22.7-2Source reference:
/affected/1/versions0.24.10-1Source reference:
/affected/1/versions0.24.2-1Source reference:
/affected/1/versions0.24.2-2Source reference:
/affected/1/versions1.0.0-1Source reference:
/affected/1/versions1.0.0-2Source reference:
/affected/1/versions1.1.0-1Source reference:
/affected/1/versions1.1.0-2Source reference:
/affected/1/versions1.1.0-3Source reference:
/affected/1/versions1.2.0-1Source reference:
/affected/1/versions1.2.1-1Source reference:
/affected/1/versions1.2.11-1Source reference:
/affected/1/versions1.2.12-1Source reference:
/affected/1/versions1.2.5-1Source reference:
/affected/1/versions1.2.7-1Source reference:
/affected/1/versions1.2.7-2Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
dulwich
Source reference: /affected/2/package/name
- Affected versions
- 0.22.7-1
Source reference:
/affected/2/versions0.22.7-2Source reference:
/affected/2/versions0.24.10-1Source reference:
/affected/2/versions0.24.2-1Source reference:
/affected/2/versions0.24.2-2Source reference:
/affected/2/versions1.0.0-1Source reference:
/affected/2/versions1.0.0-2Source reference:
/affected/2/versions1.1.0-1Source reference:
/affected/2/versions1.1.0-2Source reference:
/affected/2/versions1.1.0-3Source reference:
/affected/2/versions1.2.0-1Source reference:
/affected/2/versions1.2.1-1Source reference:
/affected/2/versions - Fixed versions
- 1.2.5-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "dulwich",
"purl": "pkg:deb/debian/dulwich?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.21.2-1",
"0.21.5-1",
"0.21.6-1",
"0.22.5-1",
"0.22.7-1",
"0.22.7-2",
"0.24.10-1",
"0.24.2-1",
"0.24.2-2",
"1.0.0-1",
"1.0.0-2",
"1.1.0-1",
"1.1.0-2",
"1.1.0-3",
"1.2.0-1",
"1.2.1-1",
"1.2.11-1",
"1.2.12-1",
"1.2.5-1",
"1.2.7-1",
"1.2.7-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47712.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "dulwich",
"purl": "pkg:deb/debian/dulwich?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.22.7-1",
"0.22.7-2",
"0.24.10-1",
"0.24.2-1",
"0.24.2-2",
"1.0.0-1",
"1.0.0-2",
"1.1.0-1",
"1.1.0-2",
"1.1.0-3",
"1.2.0-1",
"1.2.1-1",
"1.2.11-1",
"1.2.12-1",
"1.2.5-1",
"1.2.7-1",
"1.2.7-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47712.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.5-1"
}
]
}
],
"package": {
"name": "dulwich",
"purl": "pkg:deb/debian/dulwich?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.22.7-1",
"0.22.7-2",
"0.24.10-1",
"0.24.2-1",
"0.24.2-2",
"1.0.0-1",
"1.0.0-2",
"1.1.0-1",
"1.1.0-2",
"1.1.0-3",
"1.2.0-1",
"1.2.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47712.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56578 · Revision 1
- Added to Heist Feed
- Publisher date