# CVE-2023-52353: Security feature bypass in n/a

> Attackers can downgrade TLS security by exploiting session reset flaws in Mbed TLS, forcing connections to use weaker protocols than intended.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Jan 2024
- **Updated:** 30 May 2025
- **Also known as:** GHSA-jggj-wjwc-8gg9

## What is CVE-2023-52353?

CVE-2023-52353 is a high-severity vulnerability in Arm Mbed Tls, published on 21 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Mbed TLS through 3.5.1. In mbedtls_ssl_session_reset, the maximum negotiable TLS version is mishandled. For example, if the last connection negotiated TLS 1.2, then 1.2 becomes the new maximum.

Weakness: CWE-384 (Session Fixation)

## Which versions are affected by CVE-2023-52353?

It affects 1 product.


Products: Arm Mbed Tls.

## How do I fix CVE-2023-52353?

No fix has been published for CVE-2023-52353 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-52353 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-52353 exists.

## Other vulnerabilities in Arm Mbed Tls

- [CVE-2026-34877](https://insights.sbomify.com/CVE-2026-34877/): Deserialization in n/a (critical 9.8)
- [CVE-2022-46393](https://insights.sbomify.com/CVE-2022-46393/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-44732](https://insights.sbomify.com/CVE-2021-44732/): Use after free in n/a (critical 9.8)
- [CVE-2017-18187](https://insights.sbomify.com/CVE-2017-18187/): Integer overflow in n/a (critical 9.8)
- [CVE-2018-0487](https://insights.sbomify.com/CVE-2018-0487/): Memory corruption in ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0 (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-52353 and fix it if it is affected.

What it is: CVE-2023-52353 is a high-severity vulnerability in Arm Mbed Tls, published on 21 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-52353 exists.

Affected product: Arm Mbed Tls. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2023-52353/ (Markdown: https://insights.sbomify.com/CVE-2023-52353/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-52353
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-52353
- OSV: https://osv.dev/vulnerability/CVE-2023-52353

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-52353/
Summaries are generated and may contain mistakes; the official description above is the record.