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TI-2026-36218 Aliases CVE-2026-48961GHSA-hjrw-gmwj-xc9c

Improper handling of exceptional conditions in PMQS IO::Compress

Priority LOW 38CWE-755Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Partial Red Hat: 4 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

IO::Compress versions from 2.207 before 2.220 for Perl ship a zipdetails CLI tool that crashes with undefined subroutine on Info-ZIP Unix Extra Field with 8-byte UID or GID. When decode_ux() in bin/zipdetails handles an Info-ZIP Unix Extra Field (tag 0x7875) with UID Size or GID Size set to 8, causing zipdetails to decode an 8-byte UID or GID value, it dispatches through decodeLitteEndian(), which calls a misnamed helper unpackValueQ. The actual function defined in the same file is unpackValue_Q (with underscore); the call raises 'Undefined subroutine &main::unpackValueQ' and the script exits with status 255. Library callers of IO::Compress and IO::Uncompress are not affected; the defect is in the bundled CLI tool.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00262 18th percentileScored 2026-11-07
Fix Partial IO::Compress (PMQS): 2.220Red Hat: 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
PMQSIO::Compress2.207 to before 2.2202.220Patch availableCNA
  • IO::Compress VendorPMQS Affected 2.207 to before 2.220 Fixed in 2.220 Patch available CNA

Remediation

  • Fix · CNA IO::Compress (PMQS) Fixed in 2.220

Fixed in the same release

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

  • Release ·

    PMQS IO::Compress 2.220

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-36219 IO::Compress versions before 2.220 for Perl can execute arbitrary code in…Priority LOW 38
    Show all 2 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-48961
  2. 2026-10-03 Alias added: GHSA-hjrw-gmwj-xc9c

References

Patch 1

Other 1

  • TI-2026-02917 Compress::Raw::Zlib versions through 2.219 for Perl use potentially insecure versions of… CVSS 3.1CRITICAL 9.8
  • TI-2026-36217 IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte… CVSS 3.1HIGH 7.5
  • TI-2026-36219 IO::Compress versions before 2.220 for Perl can execute arbitrary code in… CVSS 3.1HIGH 7.3
  • TI-2025-14272 IO::Uncompress::Unzip versions before 2.215 for Perl propagate uncaught exception when… CVSS 3.1MEDIUM 5.5

Sources

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