CVE-2026-44788: SharpCompress is a fully managed C# library to deal with many compression types and formats

Q: How do I fix CVE-2026-44788?

sharpcompress: upgrade to newer than 0.47.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-44788 being exploited?

CVE-2026-44788 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-44788 affect?

CVE-2026-44788 affects sharpcompress. Severity is medium (CVSS 5.9). SharpCompress is a fully managed C# library to deal with many compression types and formats. In 0.47.4 and earlier, a path traversal vulnerability in IArchive.WriteToDirectory() allows a malicious archive to create directories outside the i

Q: How urgent is CVE-2026-44788?

Priority 32/100. Public exploit reference

Routine

MEDIUM 5.9UPGRADE

CVE-2026-44788 is a medium-severity flaw (CVSS 5.9) affecting sharpcompress. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SharpCompress is a fully managed C# library to deal with many compression types and formats. In 0.47.4 and earlier, a path traversal vulnerability in IArchive.WriteToDirectory() allows a malicious archive to create directories outside the intended extraction root. For TAR archives, this can be escalated to arbitrary file writes by chaining with a symlink entry, giving a full write primitive on the target filesystem subject to the permissions of t

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-05-26
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: adamhathcock

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-26 22:16 UTCPublished CVE record published
2026-07-24 11:10 UTCUpdated Record last modified

adamhathcock sharpcompress UPGRADE

Affected: <= 0.47.4

Fixed in: newer than 0.47.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sharpcompress || rpm -q sharpcompress || sharpcompress --version

2. UPGRADE to newer than 0.47.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sharpcompress

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sharpcompress

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-44788?

sharpcompress: upgrade to newer than 0.47.4. Exact commands for each OS are on this page.

Is CVE-2026-44788 being exploited?

CVE-2026-44788 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-44788 affect?

CVE-2026-44788 affects sharpcompress. Severity is medium (CVSS 5.9). SharpCompress is a fully managed C# library to deal with many compression types and formats. In 0.47.4 and earlier, a path traversal vulnerability in IArchive.WriteToDirectory() allows a malicious archive to create directories outside the i

How urgent is CVE-2026-44788?

Priority 32/100. Public exploit reference

References

← Back to latest CVEs