CVE-2026-119566
Prometheus through 3.15.1 Credential Leak via remote_write Cross-Host Redirects
Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
6.3
Prometheus through 3.15.1 Credential Leak via remote_write Cross-Host Redirects
Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.
- Record
CVE-2026-119566- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-522
- Updated
- 2026-11-04
EUVDEUVD-2026-113831
6.3
Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.
- Record
EUVD-2026-113831- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N - Updated
- 2026-11-04
GitHub AdvisoriesGHSA-597x-6fqq-75wr
6.3
Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to...
Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.
- Record
GHSA-597x-6fqq-75wr- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-522
- Updated
- 2026-11-02
NVD
6.3
Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.
- Record
CVE-2026-119566- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-522
- Updated
- 2026-11-05
OSV
6.3
Prometheus through 3.15.1 Credential Leak via remote_write Cross-Host Redirects
Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.
- Record
CVE-2026-119566- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N - Weakness
- CWE-522
- Updated
- 2026-11-05
OSVDEBIAN-CVE-2026-119566
6.3
Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.
- Record
DEBIAN-CVE-2026-119566- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-05
OSVUBUNTU-CVE-2026-119566
6.3
Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.
- Record
UBUNTU-CVE-2026-119566- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-05
OSVAZL-112688 No score
CVE-2026-119566 affecting package telegraf 1.31.0-36
Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.
- Record
AZL-112688- Updated
- 2026-11-05
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
telegrafAzure Linux:3 |
through 1.31.0-36 | None known |
golang-github-prometheus-commonDebian:12 |
All versions, plus listed versions 0.39.0-20.42.0-10.42.0-20.44.0-10.44.0-2 Show 32 moreShow less0.44.0-30.44.0-40.45.0-10.45.0-20.45.0-30.46.0-10.47.0-10.47.0-20.48.0-10.49.0-10.50.0-10.51.0-10.52.2-10.53.0-10.55.0-10.55.0-20.57.0-10.59.1-10.59.1-20.60.0-10.60.1-10.61.0-10.62.0-10.62.0-20.62.0-30.63.0-10.63.0-20.65.0-10.67.4-10.67.5-10.68.1-10.69.0-1 |
None known |
golang-github-prometheus-commonDebian:13 |
All versions, plus listed versions 0.62.0-30.63.0-10.63.0-20.65.0-10.67.4-10.67.5-10.68.1-10.69.0-1 |
None known |
golang-github-prometheus-commonDebian:14 |
before 0.69.0-1, plus listed versions 0.62.0-30.63.0-10.63.0-20.65.0-10.67.4-10.67.5-10.68.1-1 |
0.69.0-1 |
golang-github-prometheus-commonUbuntu:16.04:LTS |
All versions, plus listed versions 0+git20160104.0a3005b-1 |
None known |
golang-github-prometheus-commonUbuntu:18.04:LTS |
All versions, plus listed versions 0+git20170707.3e6a763-10+git20171117.2e54d0b-10+git20180110.89604d1-1 |
None known |
golang-github-prometheus-commonUbuntu:20.04:LTS |
All versions, plus listed versions 0+git20181119.b36ad28-20.7.0-1 |
None known |
golang-github-prometheus-commonUbuntu:22.04:LTS |
All versions, plus listed versions 0.15.0-2ubuntu10.32.1-50.32.1-5ubuntu1 |
None known |
golang-github-prometheus-commonUbuntu:24.04:LTS |
All versions, plus listed versions 0.44.0-40.45.0-30.46.0-10.47.0-2 |
None known |
golang-github-prometheus-commonUbuntu:26.04:LTS |
All versions, plus listed versions 0.62.0-30.67.4-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | CVE List, EUVD, NVD, OSV | |
| affected, aliases, facts, references | OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-119566 is a medium vulnerability (CVSS 6.3) in Prometheus, published October 30, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 10th percentile. Fixed in golang-github-prometheus-common 0.69.0-1.
References
github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/azuread/azuread.go
github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/client.go
github.com/prometheus/common/pull/901
abraxaslabs.tech/research/prometheus-bearer-redirect
github.com/prometheus/prometheus
vulncheck.com/advisories/prometheus-through-3.15.1-credential-leak-via-remote-write-cross-host-redirects