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CVE-2026-6986

A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This issue affects the function mg_aes_gcm_decrypt of the file /src/tls_aes128.c of the component GCM Authentication Tag Handler. Such manipulation leads to improper verification of cryptographic signature. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is assessed as difficult. The exploit has been disclosed publicly and may be used. Upgrading to versio
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7d43aaf7d5a00fff6898aded56399039b7ef91bff1992385ae340f07b9033fd3
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":2.6,"vectorString":"AV:N/AC:H/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/metrics/3/cvssV2_0
cwe · 2 assertions

{"cweId":"CWE-347","description":"Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-345","description":"Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*"],"modules":["GCM Authentication Tag Handler"],"product":"Mongoose","vendor":"Cesanta","versions":[{"status":"affected","version":"7.0"},{"status":"affected","version":"7.1"},{"status":"affected","version":"7.2"},{"status":"affected","version":"7.3"},{"status":"affected","version":"7.4"},{"status":"affected","version":"7.5"},{"status":"affected","version":"7.6"},{"status":"affected","version":"7.7"},{"status":"affected","version":"7.8"},{"status":"affected","version":"7.9"},{"status":"affected","version":"7.10"},{"status":"affected","version…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":2.6,"vectorString":"AV:N/AC:H/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/metrics/3/cvssV2_0

CWE assertions

2 source assertions
{"cweId":"CWE-347","description":"Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-345","description":"Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/problemTypes/1/descriptions/0

Source references

5 source assertions
{"tags":["patch"],"url":"https://github.com/cesanta/mongoose/releases/tag/7.21"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/references/4
{"tags":["exploit"],"url":"https://github.com/dwBruijn/CVEs/blob/main/Mongoose/AESGCM.md"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/references/3
{"name":"Submit #796231 | Cesanta Mongoose 7.20 Improper Verification of Cryptographic Signature","tags":["third-party-advisory"],"url":"https://vuldb.com/submit/796231"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/references/2
{"name":"VDB-359529 | Cesanta Mongoose GCM Authentication Tag tls_aes128.c mg_aes_gcm_decrypt signature verification","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/vuln/359529"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/references/0
{"name":"VDB-359529 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/vuln/359529/cti"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1452587f27bae5b705d4b52a9f53465e6ac853e6ab8cc090446caa9ae8f66637 · sha256:62dc9d1aafb2adc7… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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