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CVE-2026-44029

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix...

5.3 MediumFix available

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
None

Exploit likelihood

0.57%Up 0.3 points since May 5, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);

Record
CVE-2026-44029
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-36
Updated
2026-11-02
EUVDEUVD-2026-27166 5.3

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);

Record
EUVD-2026-27166
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-54vc-ph3h-x39x 5.3

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix...

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);

Record
GHSA-54vc-ph3h-x39x
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-36
Updated
2026-11-02
NVD 5.3

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);

Record
CVE-2026-44029
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-36
Updated
2026-11-02
OSV 5.3

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);

Record
CVE-2026-44029
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-36
Updated
2026-11-02
OSVDEBIAN-CVE-2026-44029 5.3

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);

Record
DEBIAN-CVE-2026-44029
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
Show 5 moreShow less
OSVRHSA-2026:10208 7.8

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:10208
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:10999 7.8

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:10999
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:7046 7.8

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:7046
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:9438 7.8

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:9438
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-44029 5.3

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);

Record
UBUNTU-CVE-2026-44029
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
nix
Debian:13
 All versions, plus listed versions
2.26.3+dfsg-12.32.5+dfsg-12.32.5+dfsg-22.34.3+dfsg-12.34.6+dfsg-12.34.8+dfsg-1
 None known
nix
Debian:14
 before 2.34.8+dfsg-1, plus listed versions
2.26.3+dfsg-12.32.5+dfsg-12.32.5+dfsg-22.34.3+dfsg-12.34.6+dfsg-1
2.34.8+dfsg-1
chunkah
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:0.4.0-1.hum1
0:0.4.0-1.hum1
python3-ruff
Red Hat:hummingbird:1
From an advisory covering 3 CVEs
 before 0:0.15.11-1.hum1
0:0.15.11-1.hum1
ruff
Red Hat:hummingbird:1
From an advisory covering 3 CVEs
 before 0:0.15.11-1.hum1
0:0.15.11-1.hum1
bootc
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.14.0-0.1.1.hum1
0:1.14.0-0.1.1.hum1
system-reinstall-bootc
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.14.0-0.1.1.hum1
0:1.14.0-0.1.1.hum1
rust
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-analyzer
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-debugger-common
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
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Affected packages
PackageAffectedFixed
rust-doc
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-gdb
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-lldb
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-src
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-std-static
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-std-static-aarch64-unknown-none-softfloat
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-std-static-aarch64-unknown-uefi
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-std-static-i686-pc-windows-gnu
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-std-static-wasm32-unknown-unknown
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-std-static-wasm32-wasip1
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-std-static-x86_64-pc-windows-gnu
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-std-static-x86_64-unknown-none
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rust-std-static-x86_64-unknown-uefi
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
rustfmt
Red Hat:hummingbird:1
From an advisory covering 2 CVEs
 before 0:1.95.0-2.hum1
0:1.95.0-2.hum1
nix
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
2.3.10+dfsg1-12.3.10+dfsg1-1build12.6.0+dfsg-22.6.0+dfsg-32.6.0+dfsg-3ubuntu0.1~esm1
 None known
nix
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
2.16.1+dfsg-3ubuntu12.18.1+dfsg-1ubuntu12.18.1+dfsg-1ubuntu22.18.1+dfsg-1ubuntu42.18.1+dfsg-1ubuntu52.18.1+dfsg-1ubuntu5+esm2
 None known
nix
Ubuntu:25.10
 All versions, plus listed versions
2.24.9+dfsg-2ubuntu22.26.3+dfsg-1ubuntu12.26.3+dfsg-1ubuntu22.26.3+dfsg-1ubuntu4
 None known
nix
Ubuntu:26.10
 All versions, plus listed versions
2.34.3+dfsg-12.34.6+dfsg-12.34.6+dfsg-1build12.34.8+dfsg-12.34.8+dfsg-1build1
 None known
nix
Ubuntu:26.04:LTS
 All versions, plus listed versions
2.26.3+dfsg-1ubuntu42.26.3+dfsg-1ubuntu52.32.5+dfsg-1ubuntu32.32.5+dfsg-2ubuntu12.34.3+dfsg-1
 None known

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-44029 is a medium vulnerability (CVSS 5.3) in Nixos Nix, published May 5, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.57%, the 47th percentile. Fixed in nix 2.34.8+dfsg-1.

References

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