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CVE-2026-55952

The Erlang/OTP ssl application does not validate that the PSK identity list and binder list carried in a TLS 1.3 ClientHello pre-shared key extension have equal length before passing them to the session ticket handler. In tls_handshake_1_3:handle_pre_shared_key/3, an OfferedPreSharedKeys record with a mismatched number of identities and binders is forwarded directly to tls_server_session_ticket:use/4, which crashes the session ticket handler process. An unauthenticated remote attacker can send
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3f5d4538cd0959db116497c21fba7ff632063cd0f84fa2b42e0a4ed22bda17f4
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["tls_handshake_1_3"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/ssl/src/tls_handshake_1_3.erl"],"programRoutines":[{"name":"tls_handshake_1_3:handle_pre_shared_key/3"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"29.0.3","status":"unaffected"},{"at":"28.5.0.3","status":"unaffected"},{"at":"27.3.4.14","status":"unaffected"}],"lessThan":"*","status":"affected","v…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/affected/1

{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["tls_handshake_1_3"],"packageName":"ssl","packageURL":"pkg:otp/ssl?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git","product":"OTP","programFiles":["src/tls_handshake_1_3.erl"],"programRoutines":[{"name":"tls_handshake_1_3:handle_pre_shared_key/3"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"11.7.3","status":"unaffected"},{"at":"11.6.0.3","status":"unaffected"},{"at":"11.2.12.10","status":"una…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["tls_handshake_1_3"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/ssl/src/tls_handshake_1_3.erl"],"programRoutines":[{"name":"tls_handshake_1_3:handle_pre_shared_key/3"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"29.0.3","status":"unaffected"},{"at":"28.5.0.3","status":"unaffected"},{"at":"27.3.4.14","status":"unaffected"}],"lessThan":"*","status":"affected","v…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/affected/1
{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["tls_handshake_1_3"],"packageName":"ssl","packageURL":"pkg:otp/ssl?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git","product":"OTP","programFiles":["src/tls_handshake_1_3.erl"],"programRoutines":[{"name":"tls_handshake_1_3:handle_pre_shared_key/3"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"11.7.3","status":"unaffected"},{"at":"11.6.0.3","status":"unaffected"},{"at":"11.2.12.10","status":"una…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-1284","description":"CWE-1284 Improper Validation of Specified Quantity in Input","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/problemTypes/0/descriptions/0

Source references

7 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-55952.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/2c3e599797644310e5d4aa39c7193420e59dadff"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/references/5
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/9b5437c72fa3403a75c1aba28e5c532bc191c662"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/references/6
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/e77823e6d980b2ec0b4fe4ea3f2d098ca239e3ce"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/references/4
{"tags":["vendor-advisory","related"],"url":"https://github.com/erlang/otp/security/advisories/GHSA-8c57-44c9-pc59"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-55952"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/references/2
{"tags":["x_version-scheme"],"url":"https://www.erlang.org/doc/system/versions.html#order-of-versions"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63f23dd55b0b4779942781b3e5cbdbeff832be6509e134d4bad3472c9634abdb · sha256:4cd5b7e680293e92… · /containers/cna/references/3

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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