CVE catalog
CVE-2026-96748
PyMongo's connection string parsing decodes percent-encoded characters in the host portion before the host list is separated on its delimiters. When an application places a hostname value supplied by
- Severity
- High · CVSS 8.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/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
- 0.36% · Oct 27, 2026
PyMongo's connection string parsing decodes percent-encoded characters in the host portion before the host list is separated on its delimiters. When an application places a hostname value supplied by an unauthenticated party into a connection string, that party may cause additional servers of their choosing to be added to the application's database client. The application may then send its authentication exchange and database operations to one of those servers, which can observe limited information and return altered results.
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 | pymongo | sid | 4.19.0-1 | fixed |
| Debian | pymongo | forky | 4.19.0-1 | fixed |
| Debian | pymongo | trixie | 4.10.1-6 | vulnerable |
| Debian | pymongo | bookworm | 3.11.0-1+deb12u1 | vulnerable |
| PyPI | pymongo | Not reported | 3.10.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.10.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.11.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.11.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.11.2 | vulnerable |
| PyPI | pymongo | Not reported | 3.11.3 | vulnerable |
| PyPI | pymongo | Not reported | 3.11.4 | vulnerable |
| PyPI | pymongo | Not reported | 3.12.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.12.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.12.2 | vulnerable |
| PyPI | pymongo | Not reported | 3.12.3 | vulnerable |
| PyPI | pymongo | Not reported | 3.13.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.5.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.5.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.6.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.6.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.7.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.7.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.7.2 | vulnerable |
| PyPI | pymongo | Not reported | 3.8.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.9.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.0.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.0.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.1.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.1.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.10.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.10.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.11 | vulnerable |
| PyPI | pymongo | Not reported | 4.11.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.11.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.11.3 | vulnerable |
| PyPI | pymongo | Not reported | 4.12.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.12.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.13.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.13.0.dev0 | vulnerable |
| PyPI | pymongo | Not reported | 4.13.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.13.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.14.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.14.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.3 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.4 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.5 | vulnerable |
| PyPI | pymongo | Not reported | 4.16.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.16.0.dev0 | vulnerable |
| PyPI | pymongo | Not reported | 4.17.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.18.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.18.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.2.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.3.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.3.3 | vulnerable |
| PyPI | pymongo | Not reported | 4.4.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.4.0b0 | vulnerable |
| PyPI | pymongo | Not reported | 4.4.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.5.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.6.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.6.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.6.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.6.3 | vulnerable |
| PyPI | pymongo | Not reported | 4.7.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.7.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.7.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.7.3 | vulnerable |
| PyPI | pymongo | Not reported | 4.8.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.8.0b0 | vulnerable |
| PyPI | pymongo | Not reported | 4.9 | vulnerable |
| PyPI | pymongo | Not reported | 4.9.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.9.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.18.2 | fixed |
| PyPI | pymongo | Not reported | 3.10.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.10.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.11.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.11.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.11.2 | vulnerable |
| PyPI | pymongo | Not reported | 3.11.3 | vulnerable |
| PyPI | pymongo | Not reported | 3.11.4 | vulnerable |
| PyPI | pymongo | Not reported | 3.12.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.12.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.12.2 | vulnerable |
| PyPI | pymongo | Not reported | 3.12.3 | vulnerable |
| PyPI | pymongo | Not reported | 3.13.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.5.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.5.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.6.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.6.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.7.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.7.1 | vulnerable |
| PyPI | pymongo | Not reported | 3.7.2 | vulnerable |
| PyPI | pymongo | Not reported | 3.8.0 | vulnerable |
| PyPI | pymongo | Not reported | 3.9.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.0.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.0.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.1.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.1.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.10.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.10.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.11 | vulnerable |
| PyPI | pymongo | Not reported | 4.11.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.11.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.11.3 | vulnerable |
| PyPI | pymongo | Not reported | 4.12.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.12.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.13.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.13.0.dev0 | vulnerable |
| PyPI | pymongo | Not reported | 4.13.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.13.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.14.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.14.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.3 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.4 | vulnerable |
| PyPI | pymongo | Not reported | 4.15.5 | vulnerable |
| PyPI | pymongo | Not reported | 4.16.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.16.0.dev0 | vulnerable |
| PyPI | pymongo | Not reported | 4.17.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.18.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.18.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.2.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.3.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.3.3 | vulnerable |
| PyPI | pymongo | Not reported | 4.4.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.4.0b0 | vulnerable |
| PyPI | pymongo | Not reported | 4.4.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.5.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.6.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.6.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.6.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.6.3 | vulnerable |
| PyPI | pymongo | Not reported | 4.7.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.7.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.7.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.7.3 | vulnerable |
| PyPI | pymongo | Not reported | 4.8.0 | vulnerable |
| PyPI | pymongo | Not reported | 4.8.0b0 | vulnerable |
| PyPI | pymongo | Not reported | 4.9 | vulnerable |
| PyPI | pymongo | Not reported | 4.9.1 | vulnerable |
| PyPI | pymongo | Not reported | 4.9.2 | vulnerable |
| PyPI | pymongo | Not reported | 4.18.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | pymongo | source | sid | 4.18.2-1 | not yet assigned | Not reported | [1148967] |
| Debian | pymongo | source | forky | 4.18.2-1 | not yet assigned | Not reported | [1148967] |
| Debian | pymongo | source | trixie | (unfixed) | not yet assigned | Not reported | [1148967] |
| Debian | pymongo | source | bookworm | (unfixed) | not yet assigned | Not reported | [1148967] |
| PyPI | pymongo | PyPI | Not reported | 4.18.2 | Not reported | PYSEC-2026-4297 | Not reported |
| PyPI | pymongo | PyPI | Not reported | 4.18.2 | Not reported | GHSA-VP6J-J7W5-5XJJ | Not reported |
Notes
[trixie] pymongo: Minor issue [bookworm] pymongo: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-bson]Affected
Source package: [pymongo]
Details (2)
3.11.0-1+deb12u1· amd64 · bookwormAffected
nvd · pymongo · debian · bookworm; nvd · pymongo · debian · 12
3.11.0-1+deb12u1· arm64 · bookwormAffected
nvd · pymongo · debian · bookworm; nvd · pymongo · debian · 12
- [python3-bson-ext]Affected
Source package: [pymongo]
Details (1)
3.11.0-1+deb12u1· amd64 · bookwormAffected
nvd · pymongo · debian · bookworm; nvd · pymongo · debian · 12
- [python3-gridfs]Affected
Source package: [pymongo]
Details (2)
3.11.0-1+deb12u1· all · bookwormAffected
nvd · pymongo · debian · bookworm; nvd · pymongo · debian · 12
3.11.0-1+deb12u1· all · bookwormAffected
nvd · pymongo · debian · bookworm; nvd · pymongo · debian · 12
- [python3-pymongo]Affected
Source package: [pymongo]
Details (2)
3.11.0-1+deb12u1· amd64 · bookwormAffected
nvd · pymongo · debian · bookworm; nvd · pymongo · debian · 12
3.11.0-1+deb12u1· arm64 · bookwormAffected
nvd · pymongo · debian · bookworm; nvd · pymongo · debian · 12
- [python3-pymongo-ext]Affected
Source package: [pymongo]
Details (1)
3.11.0-1+deb12u1· amd64 · bookwormAffected
nvd · pymongo · debian · bookworm; nvd · pymongo · debian · 12
- [python-pymongo-doc]Affected
Source package: [pymongo]
Details (2)
3.11.0-1+deb12u1· all · bookwormAffected
nvd · pymongo · debian · bookworm; nvd · pymongo · debian · 12
3.11.0-1+deb12u1· all · bookwormAffected
nvd · pymongo · debian · bookworm; nvd · pymongo · debian · 12
[Debian 13 (Trixie)]
- [python3-bson]Affected
Source package: [pymongo]
Details (2)
4.10.1-6· all · trixieAffected
nvd · pymongo · debian · 13
4.10.1-6· all · trixieAffected
nvd · pymongo · debian · 13
- [python3-bson-ext]Affected
Source package: [pymongo]
Details (2)
4.10.1-6· amd64 · trixieAffected
nvd · pymongo · debian · 13
4.10.1-6· arm64 · trixieAffected
nvd · pymongo · debian · 13
- [python3-gridfs]Affected
Source package: [pymongo]
Details (2)
4.10.1-6· all · trixieAffected
nvd · pymongo · debian · 13
4.10.1-6· all · trixieAffected
nvd · pymongo · debian · 13
- [python3-pymongo]Affected
Source package: [pymongo]
Details (2)
4.10.1-6· all · trixieAffected
nvd · pymongo · debian · 13
4.10.1-6· all · trixieAffected
nvd · pymongo · debian · 13
- [python3-pymongo-ext]Affected
Source package: [pymongo]
Details (2)
4.10.1-6· amd64 · trixieAffected
nvd · pymongo · debian · 13
4.10.1-6· arm64 · trixieAffected
nvd · pymongo · debian · 13
- [python-pymongo-doc]Affected
Source package: [pymongo]
Details (2)
4.10.1-6· all · trixieAffected
nvd · pymongo · debian · 13
4.10.1-6· all · trixieAffected
nvd · pymongo · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_4398-1.json]
- [https://github.com/advisories/GHSA-vp6j-j7w5-5xjj]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-96748]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-96748]
- [https://osv.dev/vulnerability/PYSEC-2026-4297]
- [https://security-tracker.debian.org/tracker/CVE-2026-96748]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96748.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3583.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]