CVE-2025-48995

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Source
https://cve.org/CVERecord?id=CVE-2025-48995
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-48995.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-48995
Aliases
Downstream
Published
2025-06-02T16:23:27.706Z
Modified
2026-04-10T05:29:19.621728Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
SignXML's signature verification with HMAC is vulnerable to a timing attack
Details

SignXML is an implementation of the W3C XML Signature standard in Python. When verifying signatures with X509 certificate validation turned off and HMAC shared secret set (signxml.XMLVerifier.verify(require_x509=False, hmac_key=...), versions of SignXML prior to 4.0.4 are vulnerable to a potential timing attack. The verifier may leak information about the correct HMAC when comparing it with the user supplied hash, allowing users to reconstruct the correct HMAC for any data.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-208"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48995.json"
}
References

Affected packages

Git / github.com/xml-security/signxml

Affected ranges

Type
GIT
Repo
https://github.com/xml-security/signxml
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
f7da15cbcba2f9f17d4aede3ec83ff165535c4bb

Affected versions

v0.*
v0.1.0
v0.1.3
v0.1.4
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.1.9
v0.2.0
v0.2.2
v0.2.3
v0.2.4
v0.2.5
v0.2.6
v0.2.7
v0.2.8
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.3.5
v0.3.6
v0.3.7
v0.3.8
v0.3.9
v0.4.0
v0.4.1
v0.4.2
v0.4.4
v0.4.5
v0.4.6
v0.5.0
v0.6.0
v1.*
v1.0.0
v1.0.1
v1.0.2
v2.*
v2.0.0
v2.1.0
v2.1.1
v2.1.2
v2.1.3
v2.1.4
v2.10.0
v2.10.1
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.3.0
v2.4.0
v2.5.0
v2.5.1
v2.5.2
v2.6.0
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v2.8.0
v2.8.1
v2.8.2
v2.9.0
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.1.0
v3.1.1
v3.2.0
v3.2.1
v3.2.2
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.0.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-48995.json"