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CVE-2026-42496— Archive::Tar versions before 3.08 for Perl extract symlinks with attacker controlled targets outside the extraction directory

Quick assessment

Affected
BINGOS Archive::Tar
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Pear Archive_Tar是PEAR团队的一个基于Php的可以对tar包进行创建、提取等操作的软件。 Pear Archive_Tar 3.08之前版本存在安全漏洞，该漏洞源于_make_special_file()函数将tar标头的linkname传递给symlink()时未验证绝对路径或..段，且安全提取模式检查未覆盖符号链接目标，可能导致提取的符号链接指向提取目录外的攻击者控制路径，后续通过提取名称打开文件可读取或写入攻击者选择的路径。

AI Predicted 8.6 Difficulty: Easy EPSS 0.43% · P35

Affected Version Matrix 1

VendorProduct Version RangeStatus
BINGOS Archive::Tar < 3.08 affected
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I. Basic Information for CVE-2026-42496

Vulnerability Information
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Vulnerability Title
Archive::Tar versions before 3.08 for Perl extract symlinks with attacker controlled targets outside the extraction directory
Source: CVE Program / CVE List V5
Vulnerability Description
Archive::Tar versions before 3.08 for Perl extract symlinks with attacker controlled targets outside the extraction directory. _make_special_file() passes the tar header's linkname to symlink() without validating it against absolute paths or .. segments. The secure-extract mode check that guards regular file extraction does not cover the symlink target. A subsequent open through the extracted name reads or writes the attacker chosen path.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Pear Archive_Tar 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Pear Archive_Tar是PEAR团队的一个基于Php的可以对tar包进行创建、提取等操作的软件。 Pear Archive_Tar 3.08之前版本存在安全漏洞，该漏洞源于_make_special_file()函数将tar标头的linkname传递给symlink()时未验证绝对路径或..段，且安全提取模式检查未覆盖符号链接目标，可能导致提取的符号链接指向提取目录外的攻击者控制路径，后续通过提取名称打开文件可读取或写入攻击者选择的路径。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
BINGOS Archive::Tar 0 ~ 3.08 -

II. Public POCs for CVE-2026-42496

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III. Intelligence Information for CVE-2026-42496

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Patches & Fixes for CVE-2026-42496 (1)

Vendor Advisories for CVE-2026-42496 (1)

Other References for CVE-2026-42496 (1)

Same Patch Batch · BINGOS · 2026-05-26 · 3 CVEs total

CVE-2026-42497 Archive::Tar versions before 3.08 for Perl extract hardlinks to attacker controlled paths
CVE-2026-9538 Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled

IV. Related Vulnerabilities

Same product: Archive::Tar
Same vendor: BINGOS
Same weakness: CWE-59

V. Comments for CVE-2026-42496

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