CVE-2026-3381

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-03-05. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, ghsa
Trending — 5 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Compress::Raw::Zlib versions through 2.219 for Perl use potentially insecure versions of zlib.

Compress::Raw::Zlib includes a copy of the zlib library. Compress::Raw::Zlib version 2.220 includes zlib 1.3.2, which addresses findings fron the 7ASecurity audit of zlib. The includes fixs for CVE-2026-27171.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

March 5, 2026

Last Modified

June 17, 2026

Advisory Details (7)

Auto-updated Jul 27, 2026
Patch available. Sources: github_release.
generic

CVE-2026-3381 · Issue #41 · pmqs/Compress-Raw-Zlib · GitHub

https://github.com/pmqs/Compress-Raw-Zlib/issues/41
generic
https://www.cve.org/CVERecord?id=CVE-2026-27171
generic

zlib audit by 7ASecurity - 7ASecurity Blog

https://7asecurity.com/blog/2026/02/zlib-7asecurity-audit/
github_release Patch Available

zlib 1.3.2

Patch available: madler/zlib v1.3.2

https://github.com/madler/zlib/releases/tag/v1.3.2
generic

GitHub - madler/zlib: A massively spiffy yet delicately unobtrusive compression library. · GitHub

https://github.com/madler/zlib
generic

zlib Home Site

https://www.zlib.net/
generic

Client Challenge

https://metacpan.org/release/PMQS/Compress-Raw-Zlib-2.221/source/Changes

Vendor Advisories for CVE-2026-3381(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 5× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-27 14:13 UTCEPSS rescore
  2. 2026-07-27 12:54 UTCEG score recompute
  3. 2026-07-27 12:54 UTCVendor advisory
  4. 2026-07-27 12:54 UTCGHSA enrichment
  5. 2026-07-27 12:50 UTCOSV refresh

Frequently asked(5)

What is CVE-2026-3381?
CVE-2026-3381 is a critical vulnerability published on March 5, 2026. Compress::Raw::Zlib versions through 2.219 for Perl use potentially insecure versions of zlib. Compress::Raw::Zlib includes a copy of the zlib library. Compress::Raw::Zlib version 2.220 includes zlib 1.3.2, which addresses findings fron the 7ASecurity audit of zlib. The includes fixs for…
When was CVE-2026-3381 disclosed?
CVE-2026-3381 was first published in the National Vulnerability Database on March 5, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-3381 actively exploited?
CVE-2026-3381 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 57.4% of all scored CVEs.
What is the CVSS score of CVE-2026-3381?
CVE-2026-3381 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-3381?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3381, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-3381

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