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CVE-2026-2968

A vulnerability was detected in Cesanta Mongoose up to 7.20. This impacts the function mg_chacha20_poly1305_decrypt of the file /src/tls_chacha20.c of the component Poly1305 Authentication Tag Handler. The manipulation results in improper verification of cryptographic signature. The attack may be launched remotely. This attack is characterized by high complexity. The exploitability is said to be difficult. The exploit is now public and may be used. The vendor was contacted early about this discl
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8c838778883824b518b457ed720a76b36c59d17e326dadf6bac23ea03e1bba8e
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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/metrics/1/cvssV3_1

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

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/metrics/3/cvssV2_0

{"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:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/metrics/0/cvssV4_0

{"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:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/metrics/2/cvssV3_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:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /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:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*"],"modules":["Poly1305 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","ve…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"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:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":2.6,"vectorString":"AV:N/AC:H/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/metrics/3/cvssV2_0
{"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:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/metrics/0/cvssV4_0
{"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:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/metrics/2/cvssV3_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:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /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:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/problemTypes/1/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/references/3
{"tags":["exploit"],"url":"https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md#poc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/references/4
{"name":"VDB-347335 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/?ctiid.347335"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/references/1
{"name":"VDB-347335 | Cesanta Mongoose Poly1305 Authentication Tag tls_chacha20.c mg_chacha20_poly1305_decrypt signature verification","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/?id.347335"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/references/0
{"name":"Submit #757091 | Cesanta Mongoose Embedded Web Server 7.20 Improper Verification of Cryptographic Signature","tags":["third-party-advisory"],"url":"https://vuldb.com/?submit.757091"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:870ef12964bb5686f0571de89c4c08ffc22d88bab1b76a7c1dbaa0282ee582a6 · sha256:165bbd3685722851… · /containers/cna/references/2

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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