CVE-2026-116137
adm-zip through 0.6.1 Duplicate-Entry Validation Bypass via Canonically Equivalent Names
CVSS v3.1 (listed by NVD)
3.7
LOW
Scored by vulncheck.com (not yet scored by NVD)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0 (listed by NVD)
6.3
MEDIUM
Scored by vulncheck.com (not yet scored by NVD)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS (listed by CVE.org)
6.3
MEDIUM
Scored by CNA (VulnCheck) · v4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS exploit probability
—
Not computed
CISA KEV
—
Not listed
Attack conditions and impact
Derived from the CNA (via NVD) CVSS 3.1 vector
NetworkNo authNo interactionConditions
Confidentiality NIntegrity LAvailability N
This vulnerability may be exploitable over the internet without authentication or user interaction.
| Metric | Value | Meaning |
|---|---|---|
| Attack vector AV | N | Network |
| Attack complexity AC | H | High (conditions required) |
| Privileges required PR | N | None |
| User interaction UI | N | None |
| Scope S | U | Unchanged |
| Confidentiality C | N | None |
| Integrity I | L | Low |
| Availability A | N | None |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Description
NVD
adm-zip through 0.6.1 contains a duplicate-entry validation bypass that allows attackers to evade the readEntries() check by using canonically equivalent entry names like './hello.txt' and 'hello.txt'. Attackers can craft ZIP archives where getEntry() or readAsText() validates benign content while extractAllTo() writes malicious content to the same path, bypassing integrity checks.
CVSS assessments
| Provider | Version | Score | Vector |
|---|---|---|---|
| NVD / [email protected] (Secondary) | 4.0 | 6.3 MEDIUM | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD / [email protected] (Primary) | 3.1 | 3.7 LOW | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
| CNA / VulnCheck | 4.0 | 6.3 MEDIUM | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA / VulnCheck | 3.1 | 3.7 LOW | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products and packages
CNA (CVE.org)
| Vendor | Product | Versions |
|---|---|---|
| cthackers | adm-zip | affected: 0 … <= 0.6.1 default: unaffected |
Linux distribution status
References (6)
- https://github.com/cthackers/adm-zip NVD, CNA product
- https://github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/adm-zip.js#L87 NVD, CNA technical-description
- https://github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/util/utils.js#L383 NVD, CNA technical-description
- https://github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/zipFile.js#L81-L92 NVD, CNA technical-description
- https://github.com/cthackers/adm-zip/issues/587 NVD, CNA issue-tracking
- https://www.vulncheck.com/advisories/adm-zip-through-0.6.1-duplicate-entry-validation-bypass-via-canonically-equivalent-names NVD, CNA third-party-advisory