CVE-2026-48102

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 91% 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, nvd
Elevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 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 9.11 through 26.00 contain a heap out-of-bounds read of up to 3 bytes in the UDF disc image handler's File Identifier Descriptor parser. In CFileId::Parse (CPP/7zip/Archive/Udf/UdfIn.cpp), after validating size < 38 + idLen + impLen and advancing processed to 38 + impLen + idLen, the alignment-padding loop reads p[processed] while incrementing up to 3 times to reach a 4-byte boundary, and the processed <= size bounds check only runs after the loop. When (38 + impLen + idLen) % 4 != 0 and 38 + impLen + idLen == size, the loop reads 1 to 3 bytes past the end of the exact-size heap buffer allocated via buf.Alloc((size_t)item.Size). The UDF handler is registered for .iso and .udf files and auto-detected by signature, and the OOB read triggers during Open() when listing or extracting a crafted UDF image. Impact is limited to information disclosure (a 1-bit oracle per OOB byte via open/fail behavior) and denial of service (crash under hardened allocators); there is no write primitive. Version 26.01 fixes the issue.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

June 5, 2026

Last Modified

June 10, 2026

Advisory Details (1)

Auto-updated Jun 17, 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/

Affected Packages

(7 across 5 ecosystems)
Debian:12(2)
PackageVulnerable rangeFixed inDependents
7zip22.01+dfsg-10~exp1, 22.01+dfsg-8, 22.01+dfsg-8+deb12u1, 22.01+dfsg-9, 22.01+really25.01+dfsg-0+deb12u122.01+really26.01+dfsg-0+deb12u1—
p7zip16.02+dfsg-8, 16.02+really25.01+dfsg-0+deb12u116.02+really26.01+dfsg-0+deb12u1—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
7zip24.09+dfsg-8 ... 26.02+dfsg-3 (24 versions)——
p7zip—16.02+transitional.1—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
7zip—26.01-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
p7zip16.02+dfsg-8, 16.02+really25.01+dfsg-0+deb11u116.02+really26.01+dfsg-0+deb11u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
7zip24.09+dfsg-8 ... 26.00+dfsg1-3 (18 versions)26.01+dfsg-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 24× 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 128 total refreshes for this CVE.

  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-14 05:02 UTCEG score recompute
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  1. 2026-08-16 14:56 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2026-48102?
CVE-2026-48102 is a medium vulnerability published on June 5, 2026. 7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-bounds read of up to 3 bytes in the UDF disc image handler's File Identifier Descriptor parser. In CFileId::Parse (CPP/7zip/Archive/Udf/UdfIn.cpp), after validating size < 38 + idLen + impLen…
When was CVE-2026-48102 disclosed?
CVE-2026-48102 was first published in the National Vulnerability Database on June 5, 2026, with the most recent update on June 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48102 actively exploited?
CVE-2026-48102 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 91.2% of all scored CVEs.
What is the CVSS score of CVE-2026-48102?
CVE-2026-48102 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-48102?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48102, 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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