CVE-2026-40895: follow-redirects · Information Exposure
Affects follow-redirectsSource CVE Database V5
Not known to be exploited · CVSS 6.9 Medium : upgrade to 1.16.0 when convenient.
Data as of 2 Nov 2026, 23:43 UTC
Sources agree
| CNA (GitHub_M) | CVSS 4.0 | 6.9 |
|---|---|---|
| ADP (redhat-SADP) | CVSS 3.1 | 7.5 |
- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-04-22.
- Patch
- Available – fixed in 1.16.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 21 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.
What to do
Upgrade follow-redirects to 1.16.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| follow-redirectsfollow-redirects | Affected
| Fixed in
|
npmfollow-redirectspkg:npm/follow-redirectsOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade follow-redirects to version 1.16.0 or later, where this issue is fixed by properly stripping custom authentication headers on cross-domain redirects. Until upgraded, avoid sending sensitive custom authentication headers in requests that may be redirected across domains. Red Hat notes that no alternative mitigations meet their criteria, so patching is the recommended action.
Description
The follow-redirects npm package prior to version 1.16.0 improperly forwards custom authentication headers such as X-API-Key or X-Auth-Token during cross-domain HTTP redirects. This behavior can lead to unintended disclosure of sensitive authentication information to untrusted redirect targets. The issue is fixed in version 1.16.0.
References
- github.com/follow-redirects/follow-redirects/security/advisories/GHSA-r4q5-vmmm-2653 (opens in a new tab)
- github.com/follow-redirects/follow-redirects/commit/844c4d302ac963d29bdb5dc1754ec7df3d70d7f9 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-40895 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2460297 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40895.json (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:17789 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:26010 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:16874 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36882 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:24539 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:25273 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:20938 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:20889 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:24766 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21338 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:13826 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:14937 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:41928 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:50300 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:24977 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:65126 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:19712 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:47728 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:48699 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:44235 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:27004 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:44263 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:27063 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:44267 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:27044 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:40768 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21772 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:16476 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:16534 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:16532 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:16535 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:16542 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:22840 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:22629 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21017 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:24853 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:19375 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:22465 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:23361 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:25271 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:24536 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:17657 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:17699 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:19109 (opens in a new tab)