CVE-2026-28809Medium· 5.3▾ SunlitXML External Entity (XXE) vulnerability in esaml (and its forks) allows an attacker to cause the system to read local files and incorporate their contents into processed SAML documents, and potentially perform SSRF via crafted SAML messa…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.2 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 24.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
XML External Entity (XXE) vulnerability in esaml (and its forks) allows an attacker to cause the system to read local files and incorporate their contents into processed SAML documents, and potentially perform SSRF via crafted SAML messages.
esaml parses attacker-controlled SAML messages using xmerl_scan:string/2 before signature verification without disabling XML entity expansion. On Erlang/OTP versions before 27, Xmerl allows entities by default, enabling pre-signature XXE attacks. An attacker can cause the host to read local files (e.g., Kubernetes-mounted secrets) into the SAML document. If the attacker is not a trusted SAML SP, signature verification will fail and the document is discarded, but file contents may still be exposed through logs or error messages.
This issue affects all versions of esaml, including forks by arekinath, handnot2, and dropbox. Users running on Erlang/OTP 27 or later are not affected due to Xmerl defaulting to entities disabled.
esaml <= 1.1esamlesaml <= 4.2.0esaml <= 4.6.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2019-3773Critical· 9.8Spring Web Services, versions 2.4.3, 3.0.4, and older unsupported versions of all three projects, were susceptible to XML External Entity Injection (XXE) when receiving XML data from untrusted sources.
CVE-2019-3774Critical· 9.8Spring Batch versions 3.0.9, 4.0.1, 4.1.0, and older unsupported versions, were susceptible to XML External Entity Injection (XXE) when receiving XML data from untrusted sources.
CVE-2026-12975High· 8.5A flaw was found in Apicurio Registry
CVE-2020-25649High· 7.5A flaw was found in FasterXML Jackson Databind, where it did not have entity expansion secured properly
CVE-2026-94108Medium· 6.5getID3 through 1.9.26 contains an XML external entity injection vulnerability in the XML2array helper function that fails to properly disable entity loading on PHP before 8.0
CVE-2026-22016High· 7.5Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JAXP)