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, epss, ghsa
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%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
45%
KEV
Not listed

Published

March 5, 2026

Last Modified

June 17, 2026

Advisory Details (7)

Auto-updated Sep 14, 2026
Patch available. Sources: github_release.
generic

zlib Home Site

https://www.zlib.net/
generic
https://www.cve.org/CVERecord?id=CVE-2026-27171
generic

Changes - metacpan.org

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

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

https://github.com/pmqs/Compress-Raw-Zlib/issues/41
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 audit by 7ASecurity - 7ASecurity Blog

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

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.

Affected Packages

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
perl-compress-raw-zlib—2.222-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
perl-compress-raw-zlib—2.222-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
perl-compress-raw-zlib—2.222-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
perl-compress-raw-zlib—2.222-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
perl-compress-raw-zlib—2.222-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libcompress-raw-zlib-perl—2.011-2—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libcompress-raw-zlib-perl—2.011-2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libcompress-raw-zlib-perl—2.011-2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libcompress-raw-zlib-perl—2.011-2—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 28× 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.

Showing the most recent 100 of 104 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 19:30 UTCEPSS rescore
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-15 03:11 UTCEPSS rescore
  7. 2026-09-13 16:47 UTCEPSS rescore
  8. 2026-09-12 15:01 UTCEPSS rescore
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 09:37 UTCEPSS rescore
  11. 2026-09-10 09:34 UTCEPSS rescore
  12. 2026-09-08 22:00 UTCEPSS rescore
  13. 2026-09-07 16:01 UTCEPSS rescore
  14. 2026-09-06 13:47 UTCEPSS rescore
  15. 2026-09-04 05:06 UTCEPSS rescore
  16. 2026-09-02 14:12 UTCEPSS rescore
  17. 2026-09-01 13:53 UTCEPSS rescore
  18. 2026-09-01 04:39 UTCEPSS rescore
  19. 2026-09-01 01:04 UTCOSV refresh
  20. 2026-08-30 19:17 UTCEPSS rescore
  21. 2026-08-30 01:22 UTCEPSS rescore
  22. 2026-08-28 21:41 UTCEPSS rescore
  23. 2026-08-27 14:25 UTCEPSS rescore
  24. 2026-08-26 14:46 UTCEPSS rescore
  25. 2026-08-25 13:49 UTCEPSS rescore
Show 75 more
  1. 2026-08-23 00:19 UTCEPSS rescore
  2. 2026-08-21 23:49 UTCEPSS rescore
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-19 17:03 UTCEPSS rescore
  5. 2026-08-18 13:48 UTCEPSS rescore
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-16 14:56 UTCEPSS rescore
  8. 2026-08-16 02:14 UTCEPSS rescore
  9. 2026-08-15 01:30 UTCEPSS rescore
  10. 2026-08-15 01:01 UTCGHSA enrichment
  11. 2026-08-14 20:55 UTCVendor advisory
  12. 2026-08-14 20:55 UTCGHSA enrichment
  13. 2026-08-14 12:38 UTCVendor advisory
  14. 2026-08-14 12:38 UTCGHSA enrichment
  15. 2026-08-14 08:33 UTCEG score recompute
  16. 2026-08-14 08:33 UTCVendor advisory
  17. 2026-08-14 08:33 UTCGHSA enrichment
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-13 04:19 UTCGHSA enrichment
  20. 2026-08-13 00:14 UTCEG score recompute
  21. 2026-08-13 00:14 UTCGHSA enrichment
  22. 2026-08-12 13:51 UTCEPSS rescore
  23. 2026-08-11 23:13 UTCEG score recompute
  24. 2026-08-11 23:13 UTCVendor advisory
  25. 2026-08-11 23:13 UTCGHSA enrichment
  26. 2026-08-11 13:43 UTCEPSS rescore
  27. 2026-08-11 05:47 UTCEG score recompute
  28. 2026-08-11 05:47 UTCVendor advisory
  29. 2026-08-11 05:47 UTCGHSA enrichment
  30. 2026-08-11 00:00 UTCEPSS rescore
  31. 2026-08-10 13:03 UTCVendor advisory
  32. 2026-08-10 13:03 UTCGHSA enrichment
  33. 2026-08-10 07:53 UTCVendor advisory
  34. 2026-08-10 07:53 UTCGHSA enrichment
  35. 2026-08-10 02:11 UTCVendor advisory
  36. 2026-08-10 02:11 UTCGHSA enrichment
  37. 2026-08-09 21:49 UTCVendor advisory
  38. 2026-08-09 21:49 UTCGHSA enrichment
  39. 2026-08-09 17:44 UTCEG score recompute
  40. 2026-08-09 17:44 UTCVendor advisory
  41. 2026-08-09 17:44 UTCGHSA enrichment
  42. 2026-08-09 13:46 UTCEPSS rescore
  43. 2026-08-09 13:38 UTCVendor advisory
  44. 2026-08-09 13:38 UTCGHSA enrichment
  45. 2026-08-09 08:11 UTCEG score recompute
  46. 2026-08-09 08:11 UTCGHSA enrichment
  47. 2026-08-08 16:37 UTCEPSS rescore
  48. 2026-08-08 08:16 UTCGHSA enrichment
  49. 2026-08-08 04:11 UTCGHSA enrichment
  50. 2026-08-08 00:06 UTCGHSA enrichment
  51. 2026-08-07 20:01 UTCEG score recompute
  52. 2026-08-07 20:01 UTCVendor advisory
  53. 2026-08-07 20:01 UTCGHSA enrichment
  54. 2026-08-06 13:46 UTCEPSS rescore
  55. 2026-08-06 06:45 UTCVendor advisory
  56. 2026-08-06 06:45 UTCGHSA enrichment
  57. 2026-08-06 02:40 UTCEG score recompute
  58. 2026-08-06 02:40 UTCVendor advisory
  59. 2026-08-06 02:40 UTCGHSA enrichment
  60. 2026-08-05 19:17 UTCEPSS rescore
  61. 2026-08-04 15:10 UTCEPSS rescore
  62. 2026-08-04 10:38 UTCEPSS rescore
  63. 2026-08-04 02:30 UTCEG score recompute
  64. 2026-08-04 02:30 UTCGHSA enrichment
  65. 2026-08-03 10:36 UTCEPSS rescore
  66. 2026-08-02 23:01 UTCVendor advisory
  67. 2026-08-02 23:01 UTCGHSA enrichment
  68. 2026-08-02 18:56 UTCEG score recompute
  69. 2026-08-02 18:56 UTCVendor advisory
  70. 2026-08-02 18:56 UTCGHSA enrichment
  71. 2026-08-02 02:27 UTCEPSS rescore
  72. 2026-08-01 04:16 UTCEPSS rescore
  73. 2026-07-30 16:28 UTCEPSS rescore
  74. 2026-07-30 01:30 UTCEPSS rescore
  75. 2026-07-27 14:13 UTCEPSS rescore

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 55.3% 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

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