CVE-Katalog
CVE-2026-93394
A flaw in libmongoc's SCRAM authentication implementation caused the client to continue the authentication handshake and transmit the client proof even when a nonce mismatch was detected in the server
- Schweregrad
- Medium · CVSS 6.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.32% · Oct 23, 2026
A flaw in libmongoc's SCRAM authentication implementation caused the client to continue the authentication handshake and transmit the client proof even when a nonce mismatch was detected in the server's first message. An unauthorized party with a man-in-the-middle position could exploit this by injecting a crafted server-first-message containing a controlled salt and low iteration count, then capturing the resulting client proof to perform offline password cracking. This vulnerability is mitigated by TLS, which is standard in production deployments.
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 | mongo-c-driver | sid | 2.5.7-1 | fixed |
| Debian | mongo-c-driver | forky | 2.5.6-1 | fixed |
| Debian | mongo-c-driver | trixie | 1.30.4-1+deb13u3 | vulnerable |
| Debian | mongo-c-driver | bookworm | 1.23.1-1+deb12u3 | vulnerable |
| Cpe | c_driver | Not reported | 2.3.2 | fixed |
| Ubuntu | mongo-c-driver | pro | 1.24.3-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.24.4-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.25.1-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.25.2-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.25.4-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.26.0-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.26.0-1.1ubuntu1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.26.0-1.1ubuntu2 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.26.0-1.1ubuntu2+esm1 | vulnerable |
| Ubuntu | mongo-c-driver | 26.04 | 1.30.4-1ubuntu1 | vulnerable |
| Ubuntu | mongo-c-driver | 26.04 | 2.2.0-1 | vulnerable |
| Ubuntu | mongo-c-driver | 26.04 | 2.2.1-1 | vulnerable |
| Ubuntu | mongo-c-driver | 26.04 | 2.2.2-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | mongo-c-driver | source | sid | 2.4.0-1 | not yet assigned | Not reported | Not reported |
| Debian | mongo-c-driver | source | forky | 2.4.0-1 | not yet assigned | Not reported | Not reported |
| Debian | mongo-c-driver | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | mongo-c-driver | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Cpe | c_driver | cpe | Not reported | 2.3.2 | Not reported | NVD-CVE-2026-93394 | Not reported |
Notes
[trixie] mongo-c-driver: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libbson-1.0-0]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· amd64 · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· arm64 · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- [libbson-dev]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· amd64 · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· arm64 · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- [libbson-doc]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· all · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· all · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- [libmongoc-1.0-0]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· amd64 · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· arm64 · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- [libmongoc-dev]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· amd64 · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· arm64 · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- [libmongoc-doc]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· all · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· all · bookwormBetroffen
nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[Debian 13 (Trixie)]
- [libbson-1.0-0t64]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· amd64 · trixieBetroffen
nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· arm64 · trixieBetroffen
nvd · mongo-c-driver · debian · 13
- [libbson-dev]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· amd64 · trixieBetroffen
nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· arm64 · trixieBetroffen
nvd · mongo-c-driver · debian · 13
- [libbson-doc]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· all · trixieBetroffen
nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· all · trixieBetroffen
nvd · mongo-c-driver · debian · 13
- [libmongoc-1.0-0t64]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· amd64 · trixieBetroffen
nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· arm64 · trixieBetroffen
nvd · mongo-c-driver · debian · 13
- [libmongoc-dev]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· amd64 · trixieBetroffen
nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· arm64 · trixieBetroffen
nvd · mongo-c-driver · debian · 13
- [libmongoc-doc]Betroffen
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· all · trixieBetroffen
nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· all · trixieBetroffen
nvd · mongo-c-driver · debian · 13
Beobachtet:
Referenzen
- [https://nvd.nist.gov/vuln/detail/CVE-2026-93394]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-93394]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-93394]
- [https://security-tracker.debian.org/tracker/CVE-2026-93394]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3453.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]