CVE-2026-48092: 7-Zip is a file archiver with a high compression ratio

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MEDIUM 4.3UPGRADE

CVE-2026-48092 is a medium-severity flaw (CVSS 4.3) affecting 7-zip. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain a heap memory disclosure via SquashFS fragment offset integer overflow on 32-bit builds. 32-bit integer overflow in the SquashFS ReadBlock function allows an attacker-controlled node.Offset value to bypass the fragment bounds check, causing memcpy to read heap memory preceding the cache buffer into the extracted file. The vulnerability is exploitable only

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.7% (top 14%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-06-05
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: 7-zip

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-05 15:16 UTCPublished CVE record published
2026-06-17 10:54 UTCUpdated Record last modified

7-zip 7-zip UPGRADE

Affected: >= 9.34 and < 26.01

Fixed in: 26.01

Safe to downgrade to: a release before 9.34

1. Check installed version

apt-cache policy 7-zip || rpm -q 7-zip || 7-zip --version

2. UPGRADE to 26.01 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade 7-zip

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade 7-zip

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 9.34 (Debian / Ubuntu)

apt-cache madison 7-zip sudo apt install 7-zip=<VERSION_BEFORE_9.34> sudo apt-mark hold 7-zip

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list 7-zip sudo dnf downgrade 7-zip-<VERSION_BEFORE_9.34> sudo dnf versionlock add 7-zip

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-48092?

7-zip: upgrade to 26.01. Exact commands for each OS are on this page.

Is CVE-2026-48092 being exploited?

CVE-2026-48092 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-48092 affect?

CVE-2026-48092 affects 7-zip. Severity is medium (CVSS 4.3). 7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain a heap memory disclosure via SquashFS fragment offset integer overflow on 32-bit builds. 32-bit integer overflow in the SquashFS ReadBlock function

How urgent is CVE-2026-48092?

Priority 42/100. Public exploit reference

Software pages

7-Zip vulnerabilities

Related CVEs

CVE-2026-58052 LOW 3.3 UPGRADE 7-Zip for Windows through 26.01 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive,
CVE-2026-48112 MEDIUM 6.5 UPGRADE 7-Zip is a file archiver with a high compression ratio
CVE-2026-48111 MEDIUM 4.3 UPGRADE 7-Zip is a file archiver with a high compression ratio
CVE-2026-48104 MEDIUM 4.2 UPGRADE 7-Zip is a file archiver with a high compression ratio
CVE-2026-48103 MEDIUM 4.3 UPGRADE 7-Zip is a file archiver with a high compression ratio

References

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