{"id":"CVE-2023-26483","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-26483","generatedAt":"2026-10-25T15:18:54.300Z","title":"SAML Service Providers using this library for SAML authentication support are likely susceptible to Denial of Service attacks.","description":"gosaml2 is a Pure Go implementation of SAML 2.0. SAML Service Providers using this library for SAML authentication support are likely susceptible to Denial of Service attacks. A bug in this library enables attackers to craft a `deflate`-compressed request which will consume significantly more memory during processing than the size of the original request. This may eventually lead to memory exhaustion and the process being killed. The maximum compression ratio achievable with `deflate` is 1032:1, so by limiting the size of bodies passed to gosaml2, limiting the rate and concurrency of calls, and ensuring that lots of memory is available to the process it _may_ be possible to help Go's garbage collector \"keep up\". Implementors are encouraged not to rely on this. This issue is fixed  in version 0.9.0.","published":"2023-03-03T23:15:12.000Z","lastModified":"2026-06-17T05:43:26.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"cwe":["CWE-409"],"affected":["gosaml2 project/gosaml2"],"epss":{"score":0.00964,"percentile":0.61378,"date":"2026-10-24","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.96%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/russellhaering/gosaml2/commit/f9d66040241093e8702649baff50cc70d2c683c0","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/russellhaering/gosaml2/releases/tag/v0.9.0","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/russellhaering/gosaml2/security/advisories/GHSA-6gc3-crp7-25w5","tags":["Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://pkg.go.dev/vuln/GO-2023-1602","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/russellhaering/gosaml2/commit/f9d66040241093e8702649baff50cc70d2c683c0","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/russellhaering/gosaml2/releases/tag/v0.9.0","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/russellhaering/gosaml2/security/advisories/GHSA-6gc3-crp7-25w5","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://pkg.go.dev/vuln/GO-2023-1602","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-26483","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}