Medium severity · published Jan 26, 2026
CVE-2025-57785
Double free in XSLT in 'show_index'
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
A Double Free in XSLT `show_index` has been identified in Hiawatha webserver version 11.7 which allows an unauthenticated attacker to corrupt data which may lead to arbitrary code execution.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HW
Hiawatha Web server · Hiawatha
11.47 through 10.8.2 · source: vendor
HW
Hiawatha Webserver · Hiawatha.leisink
11.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-57785
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-57785
Release Notes
https://gitlab.com/hsleisink/hiawatha/-/blame/master/src/xslt.c?ref_type=heads#L675
More from Hiawatha Web server
5.3
CVE-2025-57783
Improper header parsing may lead to request smuggling
3.3
CVE-2025-57784
Tomahawk authentication timing attack due to usage of 'strcmp'