# CVE-2024-6923: Email header injection due to unquoted newlines > Attackers can inject arbitrary headers into emails by exploiting improper newline quoting in the Python email module during serialization. - **Severity:** Medium 5.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Over the internet - **Victim action needed:** A user has to click or open something - **Fix available:** Yes - **Published:** 1 Aug 2024 - **Updated:** 3 Nov 2025 - **Also known as:** ALPINE-CVE-2024-6923, ALSA-2024:6146, ALSA-2024:6163, ALSA-2024:6179, AZL-47346, AZL-47367, AZL-47385, BELL-CVE-2024-6923, BIT-libpython-2024-6923, BIT-python-2024-6923, BIT-python-min-2024-6923, CLEANSTART-2026-BM92206, CLSA-2024-1726058763, CLSA-2024-1726058773, CLSA-2024-1726059010, CLSA-2024-1734643101, CLSA-2024-1734643401, CLSA-2024-1734705832, DEBIAN-CVE-2024-6923, GHSA-87qc-q3w7-7m8w, PSF-2024-8, RHSA-2024:6146, RHSA-2024:6179, RHSA-2024:7137, RHSA-2024:8103, RLSA-2024:6146, SUSE-SU-2024:2974-1, SUSE-SU-2024:3200-1, SUSE-SU-2024:3294-1, UBUNTU-CVE-2024-6923, openSUSE-SU-2024:14249-1, openSUSE-SU-2024:14254-1, openSUSE-SU-2024:14255-1 ## What is CVE-2024-6923? CVE-2024-6923 is a medium-severity code injection vulnerability in CPython, published on 1 Aug 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link. ### Official description There is a MEDIUM severity vulnerability affecting CPython. The email module didn’t properly quote newlines for email headers when serializing an email message allowing for header injection when an email is serialized. Weakness: CWE-94 (Improper Control of Generation of Code) ## Which versions are affected by CVE-2024-6923? 3 open source packages ship an affected version, including libpython, python and python-min. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `libpython` | Bitnami | All versions | 3.8.20, 3.9.20, 3.10.15, 3.11.10, 3.12.5 | | `python` | Bitnami | All versions | 3.8.20, 3.9.20, 3.10.15, 3.11.10, 3.12.5 | | `python-min` | Bitnami | All versions | 3.8.20, 3.9.20, 3.10.15, 3.11.10, 3.12.5 | | `python-unversioned-command` | AlmaLinux:9 | All versions | 3.9.18-3.el9_4.5 | | `python3` | AlmaLinux:9 | All versions | 3.9.18-3.el9_4.5 | | `python3-debug` | AlmaLinux:9 | All versions | 3.9.18-3.el9_4.5 | | `python3-devel` | AlmaLinux:9 | All versions | 3.9.18-3.el9_4.5 | | `python3-idle` | AlmaLinux:9 | All versions | 3.9.18-3.el9_4.5 | | `python3-libs` | AlmaLinux:9 | All versions | 3.9.18-3.el9_4.5 | | `python3-test` | AlmaLinux:9 | All versions | 3.9.18-3.el9_4.5 | | `python3-tkinter` | AlmaLinux:9 | All versions | 3.9.18-3.el9_4.5 | | `python3.11` | AlmaLinux:9 | All versions | 3.11.7-1.el9_4.5 | | `python3.11-debug` | AlmaLinux:9 | All versions | 3.11.7-1.el9_4.5 | | `python3.11-devel` | AlmaLinux:9 | All versions | 3.11.7-1.el9_4.5 | | `python3.11-idle` | AlmaLinux:9 | All versions | 3.11.7-1.el9_4.5 | | `python3.11-libs` | AlmaLinux:9 | All versions | 3.11.7-1.el9_4.5 | | `python3.11-test` | AlmaLinux:9 | All versions | 3.11.7-1.el9_4.5 | | `python3.11-tkinter` | AlmaLinux:9 | All versions | 3.11.7-1.el9_4.5 | | `python3.12` | AlmaLinux:9 | All versions | 3.12.1-4.el9_4.3 | | `python3.12-debug` | AlmaLinux:9 | All versions | 3.12.1-4.el9_4.3 | | `python3.12-devel` | AlmaLinux:9 | All versions | 3.12.1-4.el9_4.3 | | `python3.12-idle` | AlmaLinux:9 | All versions | 3.12.1-4.el9_4.3 | | `python3.12-libs` | AlmaLinux:9 | All versions | 3.12.1-4.el9_4.3 | | `python3.12-test` | AlmaLinux:9 | All versions | 3.12.1-4.el9_4.3 | | `python3.12-tkinter` | AlmaLinux:9 | All versions | 3.12.1-4.el9_4.3 | | `python3.11` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.11.7-1.el9_4.5 | | `python3.11-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.11.7-1.el9_4.5 | | `python3.11-debugsource` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.11.7-1.el9_4.5 | | `python3.11-devel` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.11.7-1.el9_4.5 | | `python3.11-libs` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.11.7-1.el9_4.5 | | `python3.11-tkinter` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.11.7-1.el9_4.5 | | `python3.12` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.12.1-4.el9_4.3 | | `python3.12-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.12.1-4.el9_4.3 | | `python3.12-debugsource` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.12.1-4.el9_4.3 | | `python3.12-devel` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.12.1-4.el9_4.3 | | `python3.12-libs` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.12.1-4.el9_4.3 | | `python3.12-tkinter` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.12.1-4.el9_4.3 | | `python3.11` | Red Hat:enterprise_linux:9::crb | All versions | 0:3.11.7-1.el9_4.5 | | `python3.11-debug` | Red Hat:enterprise_linux:9::crb | All versions | 0:3.11.7-1.el9_4.5 | | `python3.11-debuginfo` | Red Hat:enterprise_linux:9::crb | All versions | 0:3.11.7-1.el9_4.5 | ## How do I fix CVE-2024-6923? Upgrade libpython to a fixed version for your release line: 3.8.20, 3.9.20, 3.10.15 or 3.11.10. ## Is CVE-2024-6923 being exploited? It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-6923 exists. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2024-6923 and fix it if it is affected. What it is: CVE-2024-6923 is a medium-severity code injection vulnerability in CPython, published on 1 Aug 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link. Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-6923 exists. Affected packages and fixed versions: - libpython (Bitnami): affected all versions; fixed in 3.8.20, 3.9.20, 3.10.15, 3.11.10, 3.12.5 - python (Bitnami): affected all versions; fixed in 3.8.20, 3.9.20, 3.10.15, 3.11.10, 3.12.5 - python-min (Bitnami): affected all versions; fixed in 3.8.20, 3.9.20, 3.10.15, 3.11.10, 3.12.5 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2024-6923/ (Markdown: https://insights.sbomify.com/CVE-2024-6923/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2024-6923 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-6923 - OSV: https://osv.dev/vulnerability/CVE-2024-6923 --- From sbomify Insights: https://insights.sbomify.com/CVE-2024-6923/ Summaries are generated and may contain mistakes; the official description above is the record.