gpgtar can write outside the selected extraction directory through a pre-existing symlink

F-GNUPG-001-002

Public snapshot: 8 Oct 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

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Recorded evidence

3.6low

CVE-2026-105712CVEgnupg/gnupg

gpgtar can write outside the selected extraction directory through a pre-existing symlink

Fixed in: GnuPG 2.5.19

patched

details

Finding IDs: F-GNUPG-001-002
CVE: CVE-2026-105712
Status: patched
Fixed in: GnuPG 2.5.19
Note: The published CVE applies to gpgtar before 2.5.19 when extraction with --directory targets an existing directory containing a pre-existing symlink. A fresh empty extraction directory does not have this risk; writes remain limited by the extraction user permissions. The existing F-GNUPG-001-002 record documents the public fix and GnuPG T8159 reporter acknowledgement.
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L
CVE registry state: PUBLISHED
CVE state checked: 6 Oct 2026
CVSS assessment: MITRE CVE record; v3.1; 3.6; observed 2026-10-06

F-GNUPG-001-002: File / path escapes. gpgtar symlink traversal escapes the selected output directory. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-GNUPG-001-002

Security area (1seal assessment): Authorization. A pre-existing symlink can redirect extracted output outside the selected directory. Reviewed 6 Oct 2026.

—score not recorded

gnupg/gnupgReported fixgnupg/gnupg

tool:gpgtar: Check the output directory with --directory.

fixed publicly

details

Finding IDs: F-GNUPG-001-002
Status: fixed publicly
Reported via: private reporting channel
Note: public GnuPG T8159 tracks gpgtar write outside --directory via symlink traversal with Reported-by: Oleh Konko; commit 7a2692fe5e58 landed on 2026-03-24 and GnuPG 2.5.19 announced the fix for gpgtar -C/--directory output-directory checking on 2026-04-24. CVE-2026-105712 was published on 2026-10-05 for this gpgtar issue.

F-GNUPG-001-002: File / path escapes. gpgtar symlink traversal escapes the selected output directory. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-GNUPG-001-002

Security area (1seal assessment): Authorization. gpgtar checks that the requested extraction directory is empty and not a symlink before writing plaintext files. Reviewed 21 Sep 2026.

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