{"metadata": {"vulnerability": "CVE-2026-112991", "count": 21, "kinds": {"milestone": 6, "sighting": 1, "kev": 0, "other": 14}}, "data": [{"timestamp": "2026-09-25T22:15:46Z", "date_only": false, "value": "2026-09-25T22:15:46Z", "kind": "other", "label": "Fix developed", "source": "cvelistv5 / CIRCL", "record": "CVE-2026-112991", "field": "containers.cna.x_gcve.0.extensions.bcp-05-x-03.x_timeline.events.0.timestamp"}, {"timestamp": "2026-09-25T22:15:46Z", "date_only": false, "value": "2026-09-25T22:15:46Z", "kind": "other", "label": "Fix developed", "source": "gna-1 \u00b7 GCVE-1-2026-20287", "record": "GCVE-1-2026-20287", "field": "containers.cna.x_gcve.0.extensions.bcp-05-x-03.x_timeline.events.0.timestamp"}, {"timestamp": "2026-10-19T22:15:01Z", "date_only": false, "value": "2026-10-19T22:15:01Z", "kind": "other", "label": "Recorded", "source": "cvelistv5 / CIRCL", "record": "CVE-2026-112991", "field": "containers.cna.metrics.1.other.content.timestamp"}, {"timestamp": "2026-10-19T22:15:01Z", "date_only": false, "value": "2026-10-19T22:15:01Z", "kind": "other", "label": "Recorded", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-112991", "record": "FKIE_CVE-2026-112991", "field": "metrics.ssvcV203.0.ssvcData.timestamp"}, {"timestamp": "2026-10-19T22:15:01Z", "date_only": false, "value": "2026-10-19T22:15:01Z", "kind": "other", "label": "Recorded", "source": "gna-1 \u00b7 GCVE-1-2026-20287", "record": "GCVE-1-2026-20287", "field": "containers.cna.metrics.1.other.content.timestamp"}, {"timestamp": "2026-10-19T22:19:00Z", "date_only": false, "value": "2026-10-19T22:19:00.000Z", "kind": "milestone", "label": "Published", "source": "gna-1 \u00b7 GCVE-1-2026-20287", "record": "GCVE-1-2026-20287", "field": "cveMetadata.datePublished"}, {"timestamp": "2026-10-19T22:19:00Z", "date_only": false, "value": "2026-10-19T22:19:00.000Z", "kind": "milestone", "label": "Reserved", "source": "gna-1 \u00b7 GCVE-1-2026-20287", "record": "GCVE-1-2026-20287", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-19T22:19:44.187Z", "date_only": false, "value": "2026-10-19T22:19:44.187Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-112991", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-19T22:19:50.011Z", "date_only": false, "value": "2026-10-19T22:19:50.011Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-112991", "field": "cveMetadata.datePublished"}, {"timestamp": "2026-10-19T22:26:12.638Z", "date_only": false, "value": "2026-10-19T22:26:12.638848Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117469922732395519", "record": "CVE-2026-112991", "field": "creation_timestamp", "uuid": "179511ec-d7b1-4a2e-af89-cc2d5a7196f1", "content": "CVE-2026-112991 MISP html_to_markdown Module SSRF via Incomplete IP Range Blocking in is_safe_url() The html_to_markdown expansion module in MISP Modules contains a server-side request forgery (SSRF) vulnerability in its is_safe_url() URL validation function. The BLOCKED_RANGES list used to reject unsafe destination addresses was incomplete, omitting several critical IP address ranges. Specifically, the following ranges were not blocked: 0.0.0.0/8 (unspecified, which routes to loopback on Linux), 100.64.0.0/10 (carrier-grade NAT per RFC 6598), ::/128 (IPv6 unspecified), fc00::/7 (IPv6 Unique Local Addresses), and fe80::/10 (IPv6 link-local). The existing list only covered IPv4 loopback (127.0.0.0/8), RFC 1918 private ranges, IPv4 link-local (169.254.0.0/16), and IPv6 loopback (::1/128).\nAn authenticated user with the ability to create or modify MISP attributes that trigger the html_to_markdown expansion module could supply URLs pointing to these unblocked internal address ranges. Because the module fetches the URL server-side to convert HTML content to Markdown, the request is made from the MISP server's network context. This allows an attacker to probe and read responses from internal services, carrier-grade NAT infrastructure, or link-local endpoints that would otherwise be unreachable from external networks. IPv4-mapped IPv6 forms (e.g., [::ffff:0.0.0.0]) also bypassed the existing checks.\nThe security impact is primarily confidentiality: an attacker can read data served by internal services reachable from the MISP server. The MISP instance itself is not compromised, but it is abused as a proxy to access otherwise restricted network resources.\nhttps://www.cve.org/CVERecord?id=CVE-2026-112991https://github.com/misp/misp-modules/commit/98a1c2c2f297665dd8d4609e9cd644007a57516b#MISP #MISPModules#CVE_2026_112991#bot", "url": "https://infosec.exchange/users/cve/statuses/117469922732395519"}, {"timestamp": "2026-10-19T23:17:36Z", "date_only": false, "value": "2026-10-19T23:17:36Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-X7R8-HGM5-QQ32", "record": "GHSA-X7R8-HGM5-QQ32", "field": "database_specific.nvd_published_at"}, {"timestamp": "2026-10-19T23:17:36.350Z", "date_only": false, "value": "2026-10-19T23:17:36.350", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-112991", "record": "FKIE_CVE-2026-112991", "field": "published"}, {"timestamp": "2026-10-20T00:32:00Z", "date_only": false, "value": "2026-10-20T00:32:00Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-X7R8-HGM5-QQ32", "record": "GHSA-X7R8-HGM5-QQ32", "field": "published"}, {"timestamp": "2026-10-20T00:32:00Z", "date_only": false, "value": "2026-10-20T00:32:00Z", "kind": "other", "label": "Updated", "source": "github \u00b7 GHSA-X7R8-HGM5-QQ32", "record": "GHSA-X7R8-HGM5-QQ32", "field": "modified"}, {"timestamp": "2026-10-20T06:02:08.508Z", "date_only": false, "value": "2026-10-20T06:02:08.508Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / CIRCL", "record": "CVE-2026-112991", "field": "containers.cna.providerMetadata.dateUpdated"}, {"timestamp": "2026-10-20T08:41:46.114Z", "date_only": false, "value": "2026-10-20T08:41:46.114657Z", "kind": "other", "label": "Updated", "source": "gna-1 \u00b7 GCVE-1-2026-20287", "record": "GCVE-1-2026-20287", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2026-10-20T19:22:04.700Z", "date_only": false, "value": "2026-10-20T19:22:04.700266Z", "kind": "other", "label": "Recorded", "source": "cvelistv5 / CISA-ADP", "record": "CVE-2026-112991", "field": "containers.adp.0.metrics.0.other.content.timestamp"}, {"timestamp": "2026-10-20T19:22:04.700Z", "date_only": false, "value": "2026-10-20T19:22:04.700266Z", "kind": "other", "label": "Recorded", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-112991", "record": "FKIE_CVE-2026-112991", "field": "metrics.ssvcV203.1.ssvcData.timestamp"}, {"timestamp": "2026-10-20T19:22:15.189Z", "date_only": false, "value": "2026-10-20T19:22:15.189Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "CVE-2026-112991", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2026-10-20T19:22:15.189Z", "date_only": false, "value": "2026-10-20T19:22:15.189Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / CISA-ADP", "record": "CVE-2026-112991", "field": "containers.adp.0.providerMetadata.dateUpdated"}, {"timestamp": "2026-10-20T20:17:16.700Z", "date_only": false, "value": "2026-10-20T20:17:16.700", "kind": "other", "label": "Updated", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-112991", "record": "FKIE_CVE-2026-112991", "field": "lastModified"}]}