CVE-2023-49284 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2023-49284 Interim 1 8 2026-03-05T03:33:04Z current 2023-12-06T00:08:59Z 2026-03-05T03:33:04Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2023-49284 fish is a smart and user-friendly command line shell for macOS, Linux, and the rest of the family. fish shell uses certain Unicode non-characters internally for marking wildcards and expansions. It will incorrectly allow these markers to be read on command substitution output, rather than transforming them into a safe internal representation. While this may cause unexpected behavior with direct input (for example, echo \UFDD2HOME has the same output as echo $HOME), this may become a minor security problem if the output is being fed from an external program into a command substitution where this output may not be expected. This design flaw was introduced in very early versions of fish, predating the version control system, and is thought to be present in every version of fish released in the last 15 years or more, although with different characters. Code execution does not appear to be possible, but denial of service (through large brace expansion) or information disclosure (such as variable expansion) is potentially possible under certain circumstances. fish shell 3.6.2 has been released to correct this issue. Users are advised to upgrade. There are no known workarounds for this vulnerability. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ID5OSVJXPI7OW4ZTAPE4ZJUJIM5HRF37/ E-Mail link for openSUSE-SU-2023:0404-1 https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/S6BKN7QOVK7LIAFEI3YVTBXDS7YGI6B3/ E-Mail link for openSUSE-SU-2023:0405-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings SUSE Linux Enterprise Server 16.0 SUSE Package Hub 15 SP4 SUSE Package Hub 15 SP5 openSUSE Leap 15.4 openSUSE Leap 15.5 openSUSE Tumbleweed fish-3.3.1-bp154.3.3.1 fish-3.3.1-bp155.4.3.1 fish-3.6.4-1.1 fish-4.0.1-160000.2.2 fish-devel-3.3.1-bp154.3.3.1 fish-devel-3.3.1-bp155.4.3.1 fish-devel-3.6.4-1.1 fish-devel-4.0.1-160000.2.2 fish-4.0.1-160000.2.2 as a component of SUSE Linux Enterprise Server 16.0 fish-devel-4.0.1-160000.2.2 as a component of SUSE Linux Enterprise Server 16.0 fish-3.3.1-bp154.3.3.1 as a component of SUSE Package Hub 15 SP4 fish-devel-3.3.1-bp154.3.3.1 as a component of SUSE Package Hub 15 SP4 fish-3.3.1-bp155.4.3.1 as a component of SUSE Package Hub 15 SP5 fish-devel-3.3.1-bp155.4.3.1 as a component of SUSE Package Hub 15 SP5 fish-3.3.1-bp154.3.3.1 as a component of openSUSE Leap 15.4 fish-devel-3.3.1-bp154.3.3.1 as a component of openSUSE Leap 15.4 fish-3.3.1-bp155.4.3.1 as a component of openSUSE Leap 15.5 fish-devel-3.3.1-bp155.4.3.1 as a component of openSUSE Leap 15.5 fish-3.6.4-1.1 as a component of openSUSE Tumbleweed fish-devel-3.6.4-1.1 as a component of openSUSE Tumbleweed fish is a smart and user-friendly command line shell for macOS, Linux, and the rest of the family. fish shell uses certain Unicode non-characters internally for marking wildcards and expansions. It will incorrectly allow these markers to be read on command substitution output, rather than transforming them into a safe internal representation. While this may cause unexpected behavior with direct input (for example, echo \UFDD2HOME has the same output as echo $HOME), this may become a minor security problem if the output is being fed from an external program into a command substitution where this output may not be expected. This design flaw was introduced in very early versions of fish, predating the version control system, and is thought to be present in every version of fish released in the last 15 years or more, although with different characters. Code execution does not appear to be possible, but denial of service (through large brace expansion) or information disclosure (such as variable expansion) is potentially possible under certain circumstances. fish shell 3.6.2 has been released to correct this issue. Users are advised to upgrade. There are no known workarounds for this vulnerability. CVE-2023-49284 SUSE Linux Enterprise Server 16.0:fish-4.0.1-160000.2.2 SUSE Linux Enterprise Server 16.0:fish-devel-4.0.1-160000.2.2 SUSE Package Hub 15 SP4:fish-3.3.1-bp154.3.3.1 SUSE Package Hub 15 SP4:fish-devel-3.3.1-bp154.3.3.1 SUSE Package Hub 15 SP5:fish-3.3.1-bp155.4.3.1 SUSE Package Hub 15 SP5:fish-devel-3.3.1-bp155.4.3.1 openSUSE Leap 15.4:fish-3.3.1-bp154.3.3.1 openSUSE Leap 15.4:fish-devel-3.3.1-bp154.3.3.1 openSUSE Leap 15.5:fish-3.3.1-bp155.4.3.1 openSUSE Leap 15.5:fish-devel-3.3.1-bp155.4.3.1 openSUSE Tumbleweed:fish-3.6.4-1.1 openSUSE Tumbleweed:fish-devel-3.6.4-1.1 moderate 4.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L