CVE-2026-48101

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (20th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source

Also known asEUVD-2026-34849 (ENISA EUVD)Source: ENISA EUVD

6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 5, 2026

Last Modified

June 11, 2026

Advisory Details (1)

Auto-updated Jun 13, 2026
Patch available. Sources: github.
GitHub advisory

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/

Affected Packages

(7 across 5 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
7zip22.01+dfsg-10~exp1, 22.01+dfsg-8, 22.01+dfsg-8+deb12u1, 22.01+dfsg-9, 22.01+really25.01+dfsg-0+deb12u1
  • every version up to 22.01+really26.01+dfsg-0+deb12u1: fixed in 22.01+really26.01+dfsg-0+deb12u1
—
p7zip16.02+dfsg-8, 16.02+really25.01+dfsg-0+deb12u1
  • every version up to 16.02+really26.01+dfsg-0+deb12u1: fixed in 16.02+really26.01+dfsg-0+deb12u1
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
7zip24.09+dfsg-8 ... 26.03+dfsg-3 (27 versions)
  • every version on: no fix on record
—
p7zip—
  • every version up to 16.02+transitional.1: fixed in 16.02+transitional.1
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
7zip—
  • every version up to 26.01-r0: fixed in 26.01-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
p7zip16.02+dfsg-8, 16.02+really25.01+dfsg-0+deb11u1
  • every version up to 16.02+really26.01+dfsg-0+deb11u1: fixed in 16.02+really26.01+dfsg-0+deb11u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
7zip24.09+dfsg-8 ... 26.00+dfsg1-3 (18 versions)
  • every version up to 26.01+dfsg-1: fixed in 26.01+dfsg-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 29× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 184 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 84 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
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  18. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  19. 2026-10-25 14:23 UTCEchelonGraph re-scored
  20. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  21. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-10-22 23:08 UTCEchelonGraph re-scored
  23. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
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  1. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-10-18 03:35 UTCEchelonGraph re-scored
  4. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  6. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
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  9. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  10. 2026-10-12 16:01 UTCEchelonGraph re-scored
  11. 2026-10-11 19:44 UTCEchelonGraph re-scored
  12. 2026-10-11 16:58 UTCEchelonGraph re-scored
  13. 2026-10-11 14:23 UTCEchelonGraph re-scored
  14. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 31st percentile
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  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
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  28. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 20th percentile
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  33. 2026-09-14 05:02 UTCEchelonGraph re-scored
  34. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  35. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  50. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 20th percentile
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  74. 2026-08-07 18:14 UTCEchelonGraph re-scored
  75. 2026-08-06 19:17 UTCEchelonGraph re-scored

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-48101?
CVE-2026-48101 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-48101 published?
The CVE record for CVE-2026-48101 was published on June 5, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 11, 2026; the record at its source may have been updated since.
Is CVE-2026-48101 actively exploited?
CVE-2026-48101 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-48101?
CVE-2026-48101 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-48101?
A fix for CVE-2026-48101 is available: update to the fixed version the vendor names in its advisory.

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