182 lines
8.3 KiB
JSON
182 lines
8.3 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-55841",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-06-17T16:29:38.865Z",
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"datePublished": "2026-08-28T22:11:08.747Z",
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"dateUpdated": "2026-09-01T02:03:04.137Z"
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},
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"containers": {
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"cna": {
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"title": "Graylog: Fortigate syslog message parser can be exploited to modify or delete fields from the original message",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-138",
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"lang": "en",
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"description": "CWE-138: Improper Neutralization of Special Elements",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 7.5,
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"baseSeverity": "HIGH",
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"confidentialityImpact": "NONE",
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"integrityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
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"version": "3.1"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-gqr6-r77p-c2pj",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-gqr6-r77p-c2pj"
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},
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{
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"name": "https://github.com/Graylog2/graylog2-server/pull/26050",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/Graylog2/graylog2-server/pull/26050"
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},
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{
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"name": "https://github.com/Graylog2/graylog2-server/pull/26056",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/Graylog2/graylog2-server/pull/26056"
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},
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{
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"name": "https://github.com/Graylog2/graylog2-server/pull/26057",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/Graylog2/graylog2-server/pull/26057"
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},
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{
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"name": "https://github.com/Graylog2/graylog2-server/pull/26059",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/Graylog2/graylog2-server/pull/26059"
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},
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{
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"name": "https://github.com/Graylog2/graylog2-server/commit/793df6e8202ea55c15a762e47a2a8a775961dd3f",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/Graylog2/graylog2-server/commit/793df6e8202ea55c15a762e47a2a8a775961dd3f"
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},
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{
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"name": "https://github.com/Graylog2/graylog2-server/commit/85dc699d6319aea433583dc239077a3a799c8627",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/Graylog2/graylog2-server/commit/85dc699d6319aea433583dc239077a3a799c8627"
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},
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{
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"name": "https://github.com/Graylog2/graylog2-server/commit/d5051e604c962ef3d4e5e8e434d0ff4907d2140d",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/Graylog2/graylog2-server/commit/d5051e604c962ef3d4e5e8e434d0ff4907d2140d"
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},
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{
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"name": "https://github.com/Graylog2/graylog2-server/commit/dde76d7432c469887d9a95c208083c5f0f73c70d",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/Graylog2/graylog2-server/commit/dde76d7432c469887d9a95c208083c5f0f73c70d"
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}
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],
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"affected": [
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{
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"vendor": "Graylog2",
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"product": "graylog2-server",
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"versions": [
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{
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"version": "< 6.3.12",
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"status": "affected"
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},
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{
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"version": ">= 7.0.0-alpha.1, < 7.0.7",
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"status": "affected"
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},
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{
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"version": ">= 7.1.0-alpha.1, < 7.1.2",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-08-28T22:11:08.747Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Graylog is a free and open log management platform. Prior to Graylog Server versions 6.3.12, 7.0.7, and 7.1.2 and Graylog Forwarder version 7.3, the FortiGate key-value syslog parser in graylog2-server/src/main/java/org/graylog2/inputs/codecs/GLFortiGateSyslogEvent.java and graylog2-server/src/main/java/org/graylog2/inputs/codecs/SyslogCodec.java mishandles field-like text inside quoted values. GLFortiGateSyslogEvent.getFields() uses KV_PATTERN and QUOTED_KV_PATTERN, while SyslogCodec.parse() invokes the FortiGateSyslogEvent parser; crafted values containing = or backslash-escaped quotes can cause embedded keys such as srcip, dstip, date, time, and tz to remove or overwrite original top-level fields or produce an invalid message that Graylog discards. An unauthenticated network sender who can submit syslog messages can therefore manipulate security-log fields or evade logging to obscure malicious activity. This issue is fixed in Graylog Server versions 6.3.12, 7.0.7, and 7.1.2 and Graylog Forwarder version 7.3."
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}
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],
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"source": {
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"advisory": "GHSA-gqr6-r77p-c2pj",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-09-01T02:02:52.990384Z",
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"id": "CVE-2026-55841",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-09-01T02:03:04.137Z"
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}
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}
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]
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}
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} |