Arbitrary File Write via Archive Extraction in mholt/archiver

published 2018-07-25 8 y ago modified 2026-09-10 1 mo ago also GHSA-5wmg-j84w-4jj4 , GO-2022-0799 , EUVD-2022-0846

cvss: 5.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.5%; EPSS 2.5% chance of exploitation in 30 days, percentile 85%
public exploits: 0; none known

mholt/archiver golang package before e4ef56d48eb029648b0e895bb0b6a393ef0829c3 is vulnerable to directory traversal, allowing attackers to write to arbitrary files via a ../ (dot dot slash) in an archive entry that is mishandled during extraction. This vulnerability is also known as 'Zip-Slip'.

Patch / fix

fixed in 2 links 2

go github.com/mholt/archiver 2.1.0, 2.1.0+incompatible
golang archiver e4ef56d48eb029648b0e895bb0b6a393ef0829c3

github.com/mholt/archiver@e4ef56d commit
github.com/mholt/archiver#65 pull request

Exploit prediction

2.53% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/mholt/archiver/pull/65 referenced PoC, tagged "exploit" by a source, unverified
snyk.io https://snyk.io/research/zip-slip-vulnerability referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/snyk/zip-slip-vulnerability referenced PoC, tagged "exploit" by a source, unverified
snyk.io https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMMHOLTARCHIVERCMDARCHIVER-50071 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	5.5	CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub	3.0	5.5	CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Affected packages

ecosystem	package	affected	fixed in
go	github.com/mholt/archiver	<2.1.0 <2.1.0+incompatible	2.1.0 2.1.0+incompatible

Affected products

golang archiver

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

github.com /mholt/archiver/pull/65
web, exploit, issue-tracking, patch, third-party-advisory
github.com /mholt/archiver/commit/e4ef56d48eb029648b0e895bb0b6a393ef0829c3
web, issue-tracking, patch, third-party-advisory
snyk.io /research/zip-slip-vulnerability
web, exploit, third-party-advisory
github.com /snyk/zip-slip-vulnerability
web, exploit, third-party-advisory
snyk.io /vuln/SNYK-GOLANG-GITHUBCOMMHOLTARCHIVERCMDARCHIVER-50071
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2018-1002207
advisory
github.com /mholt/archiver
package
github.com /advisories/GHSA-5wmg-j84w-4jj4
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary