CVE-2026-28809 describes an XML External Entity (XXE) vulnerability in all versions of esaml and its forks, impacting systems running on Erlang/OTP versions prior to 27. This flaw allows an unauthenticated attacker to craft SAML messages that cause the system to read local files, such as Kubernetes secrets, and potentially perform Server-Side Request Forgery (SSRF). With a CVSS score of 6.3 (Medium), the primary impact is on confidentiality, as sensitive file contents could be exposed through logs or error messages, even if SAML signature verification fails. There is currently no evidence of active exploitation, public exploit code, or significant community attention for this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 1.1CPE matchmatch criteria | cpe:2.3:a:arekinath:esaml:*:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:dropbox:esaml:-:*:*:*:*:*:*:* | ||
<= 4.2.0CPE matchmatch criteria | cpe:2.3:a:handnot2:esaml:*:*:*:*:*:*:*:* | ||
<= 4.6.0CPE matchmatch criteria | cpe:2.3:a:jump-app:esaml:*:*:*:*:*:*:*:* | ||
All Versions ImpactedCPE match | cpe:2.3:a:arekinath:esaml:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/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
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