GHSA-gmhf-gg8w-jw42
Suggest an improvement- Source
- https://github.com/advisories/GHSA-gmhf-gg8w-jw42
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/06/GHSA-gmhf-gg8w-jw42/GHSA-gmhf-gg8w-jw42.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-gmhf-gg8w-jw42
- Aliases
- Published
- 2025-06-05T00:37:19Z
- Modified
- 2026-07-07T17:56:23.298719018Z
- 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
-
When verifying signatures with X509 certificate validation turned off and HMAC shared secret set (
signxml.XMLVerifier.verify(require_x509=False, hmac_key=...), prior versions of SignXML 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
{ "github_reviewed_at": "2025-06-05T00:37:19Z", "nvd_published_at": "2025-06-02T17:15:41Z", "cwe_ids": [ "CWE-208" ], "severity": "MODERATE", "github_reviewed": true }- References
Affected packages
PyPI / signxml
Package
- Name
- signxml
- View open source insights on deps.dev
- Purl
- pkg:pypi/signxml
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed4.0.4
Affected versions
0.*
0.0.1
0.1.0
0.1.1
0.1.2
0.1.3
0.1.4
0.1.5
0.1.6
0.1.7
0.1.8
0.1.9
0.2.0
0.2.1
0.2.2
0.2.3
0.2.4
0.2.5
0.2.6
0.2.7
0.2.8
0.2.9
0.3.0
0.3.1
0.3.2
0.3.3
0.3.4
0.3.5
0.3.6
0.3.7
0.3.8
0.3.9
0.4.0
0.4.1
0.4.2
0.4.3
0.4.4
0.4.5
0.4.6
0.5.0
0.6.0
1.*
1.0.0
1.0.1
1.0.2
2.*
2.0.0
2.1.4
2.2.0
2.2.1
2.2.2
2.2.3
2.2.4
2.2.6
2.3.0
2.4.0
2.5.2
2.6.0
2.7.0
2.7.1
2.7.2
2.7.3
2.8.0
2.8.1
2.8.2
2.9.0
2.10.0
2.10.1
3.*
3.0.0
3.0.1
3.0.2
3.1.0
3.1.1
3.2.0
3.2.1
3.2.2
4.*
4.0.0
4.0.1
4.0.2
4.0.3