CVE-2026-34527

Q: How do I fix CVE-2026-34527?

Upgrade sandboxie to 1.17.3 or later.

Q: Is CVE-2026-34527 being actively exploited?

Not that we know of. CVE-2026-34527 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.09% is the estimated probability that it will be exploited in the next 30 days. That is higher than 1% of all scored CVEs.

Q: How severe is CVE-2026-34527?

CVE-2026-34527 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-34527 affect?

Published advisories record a fix for sandboxie (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

5.3

CVSS v3

NVD

Description

Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, SbieIniServer::HashPassword converts a SHA-1 digest to hexadecimal incorrectly. The high nibble of each byte is shifted right by 8 instead of 4, which always produces zero for an 8-bit value. As a result, the stored EditPassword hash only preserves the low nibble of each digest byte, reducing the effective entropy from 160 bits to 80 bits. This is layered on top of an unsalted SHA-1 scheme. The reduced entropy makes leaked or backed-up password hashes materially easier to brute-force. This issue has been fixed in version 1.17.3.

CWE-328

How to fix

Remediation Available

sandboxieNVD

Affected:< 1.17.3Fixed in:1.17.3CVE-2026-34527derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.09%probability of exploitation in 30 days

1stpercentile

Low risk: more likely to be exploited than 1% of all known CVEs.

References

Vendor Advisory1

github.com

Related Vulnerabilities

Other CWE-328 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2004-2761	Critical	9.8	9.9%	-	-
CVE-2024-54143	Unscored	-	1.9%	-	-
CVE-2022-3433	Medium	6.5	0.7%	-	Fix
CVE-2022-29249	High	7.5	0.7%	-	-
CVE-2023-2900	Low	3.7	0.7%	-	-
CVE-2023-46233	Critical	9.1	0.6%	-	Fix

Common questions

How do I fix CVE-2026-34527?

Upgrade sandboxie to 1.17.3 or later.

Is CVE-2026-34527 being actively exploited?

Not that we know of. CVE-2026-34527 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.09% is the estimated probability that it will be exploited in the next 30 days. That is higher than 1% of all scored CVEs.

How severe is CVE-2026-34527?

CVE-2026-34527 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-34527 affect?

Published advisories record a fix for sandboxie (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-34527

Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-24.