# CVE-2020-19909: Integer overflow in n/a

> An integer overflow in curl's retry delay handling could theoretically cause denial of service if misconfigured, though direct security impact is minimal.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Aug 2023
- **Updated:** 14 Oct 2026
- **Also known as:** DEBIAN-CVE-2020-19909, GHSA-2792-x8v5-77wp

## What is CVE-2020-19909?

CVE-2020-19909 is a low-severity vulnerability in Haxx Curl, published on 22 Aug 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Integer overflow vulnerability in tool_operate.c in curl 7.65.2 via a large value as the retry delay. NOTE: many parties report that this has no direct security impact on the curl user; however, it may (in theory) cause a denial of service to associated systems or networks if, for example, --retry-delay is misinterpreted as a value much smaller than what was intended. This is not especially plausible because the overflow only happens if the user was trying to specify that curl should wait weeks (or longer) before trying to recover from a transient error.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2020-19909?

It affects 1 product.


Products: Haxx Curl.

## How do I fix CVE-2020-19909?

Upgrade to a fixed version.

## Is CVE-2020-19909 being exploited?

There is no known exploitation of CVE-2020-19909 in the wild and no public exploit code.

## Other vulnerabilities in Haxx Curl

- [CVE-2026-19931](https://insights.sbomify.com/CVE-2026-19931/): Negotiate ambient user conn reuse (critical 9.8)
- [CVE-2026-10536](https://insights.sbomify.com/CVE-2026-10536/): HTTP/2 stream-dependency tree UAF (critical 9.8)
- [CVE-2026-11856](https://insights.sbomify.com/CVE-2026-11856/): cross-origin Digest auth state leak (critical 9.8)
- [CVE-2026-8925](https://insights.sbomify.com/CVE-2026-8925/): SASL double-free (critical 9.8)
- [CVE-2026-9079](https://insights.sbomify.com/CVE-2026-9079/): stale proxy password leak (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-19909 and fix it if it is affected.

What it is: CVE-2020-19909 is a low-severity vulnerability in Haxx Curl, published on 22 Aug 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-19909 in the wild and no public exploit code.

Affected product: Haxx Curl. 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-2020-19909/ (Markdown: https://insights.sbomify.com/CVE-2020-19909/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-19909
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-19909
- OSV: https://osv.dev/vulnerability/CVE-2020-19909

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-19909/
Summaries are generated and may contain mistakes; the official description above is the record.