CVE-2026-3381

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.58% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 47.5% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-05 01:28Z7 MO AGO

Last updated

2026-03-11 15:00Z7 MO AGO

Reserved

2026-02-28

Assigning CNA

CPANSec

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-1395Dependency on Vulnerable Third-Party ComponentClass
• CWE-1284Improper Validation of Specified Quantity in InputBase
• CWE-1104Use of Unmaintained Third Party ComponentsBase

Data version

5.2

Document digest

bfc197bd59eabd3e5b0d3f0321f4d17a072b5a7fdae1a073782a0022fd01da83

• metacpan.orghttps://metacpan.org/release/PMQS/Compress-Raw-Zlib-2.221/source/Changesrelease-notes
• www.zlib.nethttps://www.zlib.net/
• github.comhttps://github.com/madler/zlib
• github.comhttps://github.com/madler/zlib/releases/tag/v1.3.2release-notes
• 7asecurity.comhttps://7asecurity.com/blog/2026/02/zlib-7asecurity-audit/technical-description
• www.cve.orghttps://www.cve.org/CVERecord?id=CVE-2026-27171vendor-advisoryrelatedvdb-entry
• github.comhttps://github.com/pmqs/Compress-Raw-Zlib/issues/41issue-tracking