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CVE-2026-48103

7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain an off-by-one heap out-of-bounds read in the WIM (Windows Imaging) archive handler's security descriptor lookup. In CHandler::GetSecurity (CPP/7zip/Archive/Wim/WimHandler.cpp), the per-image SecurOffsets table holds numEntries + 1 cumulative offsets, but the check securityId >= SecurOffsets.Size() admits securityId == numEntries, and the function then reads SecurOffsets[securityId + 1], fetching one UInt3
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f9590e72a9647d476f39e264796e55c4df16557388b8fe4afc0b6a1e0144f9dd
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"7-Zip","vendor":"mcmilk","versions":[{"status":"affected","version":">= 9.34, < 26.01"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f266410b253946bdacbb4797aecf1b5a8f2af155e6b8b11d8b94cd16b405c600 · sha256:2bd51bd348baf426… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f266410b253946bdacbb4797aecf1b5a8f2af155e6b8b11d8b94cd16b405c600 · sha256:2bd51bd348baf426… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f266410b253946bdacbb4797aecf1b5a8f2af155e6b8b11d8b94cd16b405c600 · sha256:2bd51bd348baf426… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/","tags":["x_refsource_CONFIRM"],"url":"https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f266410b253946bdacbb4797aecf1b5a8f2af155e6b8b11d8b94cd16b405c600 · sha256:2bd51bd348baf426… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f266410b253946bdacbb4797aecf1b5a8f2af155e6b8b11d8b94cd16b405c600 · sha256:2bd51bd348baf426… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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