CVE catalog
CVE-2025-48995
DEBIAN-CVE-2025-48995
- Severity
- Unknown
- Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.23% · Oct 27, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | python-signxml | 13 | 4.0.5+dfsg-1 | fixed |
| Debian | python-signxml | 14 | 4.0.5+dfsg-1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-signxml | deb | 13 | 4.0.5+dfsg-1 | Not reported | DEBIAN-CVE-2025-48995 | Not reported |
| Debian | python-signxml | deb | 14 | 4.0.5+dfsg-1 | Not reported | DEBIAN-CVE-2025-48995 | Not reported |
OpenFactory catalog packages
[Debian 13 (Trixie)]
- [python3-signxml]Fixed
Source package: [python-signxml]
Details (2)
4.0.5+dfsg-2· all · trixieFixed · Fixed:
4.0.5+dfsg-1pypi · python-signxml · debian · 13
4.0.5+dfsg-2· all · trixieFixed · Fixed:
4.0.5+dfsg-1pypi · python-signxml · debian · 13
- [python-signxml-doc]Fixed
Source package: [python-signxml]
Details (2)
4.0.5+dfsg-2· all · trixieFixed · Fixed:
4.0.5+dfsg-1pypi · python-signxml · debian · 13
4.0.5+dfsg-2· all · trixieFixed · Fixed:
4.0.5+dfsg-1pypi · python-signxml · debian · 13
Observed: