An issue was discovered in zsh before 5.6. Shebang lines exceeding 64 characters were truncated, potentially leading to an execve call to…

Description

An issue was discovered in zsh before 5.6. Shebang lines exceeding 64 characters were truncated, potentially leading to an execve call to a program name that is a substring of the intended one.

Scores

EPSS (exploitation in 30 days)

2.7% · top 14% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

• improper parsing
• CWE-20 (opens in a new tab)All about CWE-20 and its CVEs

Affected products

• zsh before 5.6

  • affected zsh before 5.6

References (7)

• https://bugs.debian.org/908000 (opens in a new tab)x_refsource_MISCx_transferred
• https://sourceforge.net/p/zsh/code/ci/1c4c7b6a4d17294df028322b70c53803a402233d (opens in a new tab)x_refsource_MISCx_transferred
• https://www.zsh.org/mla/zsh-announce/136 (opens in a new tab)x_refsource_MISCx_transferred
• USN-3764-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• GLSA-201903-02 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• RHSA-2019:2017 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [debian-lts-announce] 20201201 [SECURITY] [DLA 2470-1] zsh security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2018-13259](https://trackcve.app/badge/CVE-2018-13259.svg)](https://trackcve.app/cve/CVE-2018-13259)

Record last updated 5 Aug 2024, 09:00 UTC.