{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "673b978aab1fe3ab874247be32c871acc880cbeb"
            }
          ],
          "repo": "https://github.com/pjsip/pjproject",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rfwg-w9gq-9mw2"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-129",
      "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57159.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "673b978aab1fe3ab874247be32c871acc880cbeb"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "PJSIP is a free and open source multimedia communication library written in C. Prior to commit 673b978, a remote out-of-bounds read and write can occur in the SDP negotiator when the remote payload-type map maintenance feature is enabled. assign_pt_and_update_map() in pjmedia/src/pjmedia/sdp_neg.c uses payload-type numbers taken from a remote SDP offer or answer to index fixed-size internal tables without sufficient bounds validation, so a crafted remote SDP can cause memory access outside those tables. The practical impact is memory corruption and denial of service; code execution is not demonstrated. This path is only reached when PJMEDIA_SDP_NEG_MAINTAIN_REMOTE_PT_MAP is enabled. The default is disabled, so default builds are not affected; the feature is an interoperability option that integrating products may enable. This issue has been patched via commit 673b978.",
  "id": "CVE-2026-57159",
  "modified": "2026-09-09T03:30:57.882421670Z",
  "published": "2026-09-04T17:11:26.957Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57159.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/pjsip/pjproject/security/advisories/GHSA-rfwg-w9gq-9mw2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-57159"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pjsip/pjproject/commit/673b978aab1fe3ab874247be32c871acc880cbeb"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "PJSIP: SDP parser out-of-bounds write in remote payload-type map maintenance"
}