Golang github prometheus common: Prometheus through 3.15.1 contains a credential leak vulnerability that allows
Affects golang-github-prometheus-commonSource GCVE Database
Not known to be exploited · CVSS 6.3 Medium.
Data as of 5 Nov 2026, 12:35 UTC
Thin evidence
One scorer or none| CNA (VulnCheck) | CVSS 4.0 | 6.3 |
|---|---|---|
| CNA (VulnCheck) | CVSS 3.1 | 4.8 |
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 30 Oct 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 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSgolang-github-prometheus-commonpkg:deb/ubuntu/golang-github-prometheus-common?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSgolang-github-prometheus-commonpkg:deb/ubuntu/golang-github-prometheus-common?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSgolang-github-prometheus-commonpkg:deb/ubuntu/golang-github-prometheus-common?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu 20.04 LTSgolang-github-prometheus-commonpkg:deb/ubuntu/golang-github-prometheus-common?arch=source&distro=focalOther threats | Affected
| Fixed in– |
Ubuntu 18.04 LTSgolang-github-prometheus-commonpkg:deb/ubuntu/golang-github-prometheus-common?arch=source&distro=bionicOther threats | Affected
| Fixed in– |
Ubuntu 16.04 LTSgolang-github-prometheus-commonpkg:deb/ubuntu/golang-github-prometheus-common?arch=source&distro=xenialOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
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.
References
- ubuntu.com/security/CVE-2026-119566 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-119566 (opens in a new tab)
- github.com/prometheus/common/pull/901 (opens in a new tab)
- abraxaslabs.tech/research/prometheus-bearer-redirect (opens in a new tab)
- github.com/prometheus/prometheus (opens in a new tab)
- github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/azuread/azuread.go (opens in a new tab)
- github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/client.go (opens in a new tab)
- vulncheck.com/advisories/prometheus-through-3.15.1-credential-leak-via-remote-write-cross-host-redirects (opens in a new tab)