CVE-2026-48101

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 80% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

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

7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an An uninitialized memory disclosure vulnerability in the UEFI capsule (.scap) parser in 7-Zip. The OpenCapsule function allocates a heap buffer of attacker-declared CapsuleImageSize (up to 1 GiB) without zero-initialization, then reads the file contents into it with ReadStream_FALSE whose return value is silently discarded. If the file is truncated, the unread tail of the buffer retains uninitialized heap memory, which is then exposed as extracted file content via GetStream. Version 26.0.1 fixes the issue.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
19.6%
KEV
Not listed

Published

June 5, 2026

Last Modified

June 11, 2026

Advisory Details (1)

Auto-updated Jun 13, 2026
🔬 Proof of concept available. No patch confirmed yet. Sources: github.
github🟡 PoC Available

GHSL-2026-115–GHSL-2026-122: Various memory access violations in 7-Zip | GitHub Security Lab

https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 65× 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. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-12 05:19 UTCEG score recompute
  3. 2026-07-11 08:27 UTCEPSS rescore
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  6. 2026-07-09 06:47 UTCEG score recompute
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  18. 2026-07-01 15:07 UTCEPSS rescore
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  21. 2026-06-29 14:06 UTCEPSS rescore
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  1. 2026-06-28 04:56 UTCEPSS rescore
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  3. 2026-06-27 13:48 UTCEG score recompute
  4. 2026-06-27 03:08 UTCEPSS rescore
  5. 2026-06-26 14:50 UTCEG score recompute
  6. 2026-06-25 15:34 UTCEG score recompute
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  9. 2026-06-24 14:05 UTCEPSS rescore
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  12. 2026-06-23 17:37 UTCEG score recompute
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  14. 2026-06-22 14:25 UTCEPSS rescore
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  16. 2026-06-21 14:56 UTCEPSS rescore
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  18. 2026-06-21 07:35 UTCEG score recompute
  19. 2026-06-21 01:59 UTCEPSS rescore
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  21. 2026-06-20 08:35 UTCEG score recompute
  22. 2026-06-19 19:26 UTCEPSS rescore
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  24. 2026-06-19 02:22 UTCEG score recompute
  25. 2026-06-18 17:52 UTCEPSS rescore
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  27. 2026-06-18 02:06 UTCEG score recompute
  28. 2026-06-17 17:53 UTCEPSS rescore
  29. 2026-06-17 03:09 UTCEG score recompute
  30. 2026-06-16 17:53 UTCEPSS rescore
  31. 2026-06-16 04:11 UTCEG score recompute
  32. 2026-06-15 17:49 UTCEPSS rescore
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  34. 2026-06-15 05:13 UTCEG score recompute
  35. 2026-06-14 23:18 UTCEPSS rescore
  36. 2026-06-14 06:16 UTCEG score recompute
  37. 2026-06-13 23:00 UTCEPSS rescore
  38. 2026-06-13 07:19 UTCEG score recompute
  39. 2026-06-12 23:12 UTCEPSS rescore
  40. 2026-06-12 23:12 UTCEPSS rescore
  41. 2026-06-12 08:22 UTCEG score recompute
  42. 2026-06-11 14:00 UTCEPSS rescore
  43. 2026-06-11 09:24 UTCEG score recompute
  44. 2026-06-10 22:18 UTCEPSS rescore
  45. 2026-06-10 13:22 UTCEPSS rescore
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  47. 2026-06-10 10:27 UTCEG score recompute
  48. 2026-06-09 11:30 UTCEG score recompute
  49. 2026-06-08 14:17 UTCEPSS rescore
  50. 2026-06-08 14:17 UTCEPSS rescore
  51. 2026-06-08 12:33 UTCEG score recompute
  52. 2026-06-07 15:25 UTCEPSS rescore
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  54. 2026-06-07 13:37 UTCEG score recompute
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  56. 2026-06-06 13:47 UTCEPSS rescore
  57. 2026-06-06 13:47 UTCEPSS rescore
  58. 2026-06-05 15:43 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-48101?
CVE-2026-48101 is a medium vulnerability published on June 5, 2026. 7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an An uninitialized memory disclosure vulnerability in the UEFI capsule (.scap) parser in 7-Zip. The OpenCapsule function allocates a heap buffer of attacker-declared CapsuleImageSize (up to 1 GiB) without…
When was CVE-2026-48101 disclosed?
CVE-2026-48101 was first published in the National Vulnerability Database on June 5, 2026, with the most recent update on June 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48101 actively exploited?
CVE-2026-48101 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48101?
CVE-2026-48101 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-48101?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48101, 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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