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TI-2026-78717 Aliases CVE-2026-114104

Duplicate ZIP entry names bypass validation in adm-zip

Priority HIGH 69CWE-436Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 6 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

adm-zip before 0.6.1 resolves ZIP entries inconsistently when an archive contains duplicate entry names (CWE-436). Lookups return the last duplicate while extraction writes the first, so unvalidated bytes reach disk. A remote attacker who supplies a crafted archive can bypass validation, with high attack complexity and no privileges or user interaction needed. CISA SSVC rates exploitation as proof of concept.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

adm-zip before 0.6.1 contains an inconsistent entry resolution vulnerability that allows attackers to bypass content validation by supplying ZIP archives with duplicate entry names. Attackers can craft archives where getEntry() returns the last duplicate while extractAllTo() writes the first, causing unvalidated bytes to be written to disk.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00331 26th percentileScored 2026-11-07
Fix Partial adm-zip (cthackers): 0.6.1Red Hat: 6 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
cthackersadm-zipbefore 0.6.10.6.1Patch availableCNA
  • adm-zip Vendorcthackers Affected before 0.6.1 Fixed in 0.6.1 Patch available CNA

Remediation

Upgrade adm-zip to 0.6.1, the fixed version. The sources list no fixed version for Red Hat Advanced Cluster Management for Kubernetes 2 and Red Hat Fuse 7, and Red Hat lists none available for Red Hat Developer Hub 1, Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Container Platform 4 and Red Hat OpenShift Container Platform 5.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA adm-zip (cthackers) Fixed in 0.6.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    cthackers adm-zip 0.6.1

    4 records Highest priority Priority HIGH 3 HIGH, 1 LOW

    Other records, highest priority first

    • TI-2026-78715 Denial of service in adm-zip via unhandled error in inflateAsyncPriority HIGH 77
    • TI-2026-78716 Decompression bomb guard bypass in adm-zip exhausts memoryPriority HIGH 70
    • TI-2026-78718 Privilege escalation in adm-zip via setuid bits on extracted filesPriority LOW 29
    Show all 4 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Advanced Cluster Management for Kubernetes 2AffectedNo fix planned: Out of support scope
Red Hat Developer Hub 1AffectedNo fix yet: Fix deferred
Red Hat Fuse 7AffectedNo fix planned: Out of support scope
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 5AffectedNo fix yet: Fix deferred
Not affected: 5 products
  • Cost Management On Premise
  • Red Hat Build of Podman Desktop
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Self-service automation portal 2

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-114104
  2. 2026-10-21 Affected versions changed · Red Hat
  3. 2026-10-21 CVSS score added · Red Hat
  4. 2026-10-22 Priority changed: MEDIUM → LOW
  5. 2026-10-27 Affected versions changed · Red Hat
  6. 2026-10-28 CISA SSVC decision points changed
  7. 2026-10-28 Priority changed: LOW → HIGH
  8. 2026-10-30 Affected versions changed · Red Hat

References

Advisory 1

  • TI-2026-78715 Denial of service in adm-zip via unhandled error in inflateAsync CVSS 4.0HIGH 8.7
  • TI-2026-53963 adm-zip: Uncontrolled memory allocation via the declared uncompressed size (DoS) CVSS 3.1HIGH 7.5
  • TI-2026-78716 Decompression bomb guard bypass in adm-zip exhausts memory CVSS 4.0MEDIUM 6.9
  • TI-2026-67762 adm-zip extraction keeps setuid bits from untrusted ZIP files CVSS 3.1HIGH 7.1
  • TI-2026-62130 adm-zip 0.5.14 through 0.6.0 Denial of Service via Zero Declared Uncompressed Size CVSS 4.0HIGH 8.7
  • TI-2026-78718 Privilege escalation in adm-zip via setuid bits on extracted files CVSS 4.0MEDIUM 6.9
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences