CVE Explorer
CVE-2026-48101
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 he
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":">= 9.21, < 26.01"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:1a17e20fdf1a5a7ac3465ec0f4e06461d3a7ce982e97a264af45cc837037d539 · sha256:7fb96b2da6188e24… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:1a17e20fdf1a5a7ac3465ec0f4e06461d3a7ce982e97a264af45cc837037d539 · sha256:7fb96b2da6188e24… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-908","description":"CWE-908: Use of Uninitialized Resource","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:1a17e20fdf1a5a7ac3465ec0f4e06461d3a7ce982e97a264af45cc837037d539 · sha256:7fb96b2da6188e24… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"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_v5referenceurn:baitaphish:normalized-source-record:v2:1a17e20fdf1a5a7ac3465ec0f4e06461d3a7ce982e97a264af45cc837037d539 · sha256:7fb96b2da6188e24… · /containers/cna/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.