Skip to main content
VulnerabilityPublished Updated

CVE-2026-48092: mcmilk 7-Zip · Out-of-bounds Read

Affects mcmilk 7-ZipSource CVE Database V5

0
Compare

Not known to be exploited · CVSS 4.3 Medium : upgrade to 26.01 when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
2.7% chance of exploitation in 30 days – higher than 86% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 26.01
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade 7-Zip and mcmilk/7-zip to 26.01.

Affected software

ProductAffectedFixed in
mcmilk7-ZipAffected
  • >=9.34 <26.01
Fixed in
  • 26.01
GitHubmcmilk/7-zippkg:github/mcmilk/7-zipOther threatsAffected
  • <26.01 >=9.34
Fixed in
  • 26.01

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade affected 32-bit versions of 7-Zip to version 26.01 or later, where this vulnerability is patched. No other mitigation or temporary fix is indicated. For 64-bit builds, this vulnerability does not apply due to architectural differences.

Description

A heap memory disclosure vulnerability exists in 32-bit builds of 7-Zip versions 9.34 through 26.00 due to an integer overflow in the SquashFS ReadBlock function. This overflow allows an attacker-controlled offset to bypass fragment bounds checks, causing memcpy to read memory preceding the cache buffer into the extracted file. The issue is fixed in version 26.01. The vulnerability has a medium severity rating with a CVSS score of 4.3.

References

Community reviews

Loading reviews…