CVE Explorer

CVE-2026-62995

joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. in versions 1.7.1 and prior, joserfc accepts JWTs with trailing padding (==) which are not conforming to the JOSE specifications. This leads to malleability of the JWTs when consumed by joserfc. Depending on this application this might or not be an issue. This could lead to bypass of token revocation or anti-replay protection when implemented as a deny list of tokens or a

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:46779584d88bb456a29958a95298a6cc7f19df1842e0b443ebdf460278586a84

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"joserfc","vendor":"authlib","versions":[{"status":"affected","version":"< 1.7.2"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:e2050c8426ea9f7370f2ab2167a57c10c235f36b6d5763009567f342271fa4e6 · sha256:0a85630fa3509697… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:e2050c8426ea9f7370f2ab2167a57c10c235f36b6d5763009567f342271fa4e6 · sha256:0a85630fa3509697… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

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

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:e2050c8426ea9f7370f2ab2167a57c10c235f36b6d5763009567f342271fa4e6 · sha256:0a85630fa3509697… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"name":"https://github.com/authlib/joserfc/security/advisories/GHSA-5jhw-7jv7-qcqq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/authlib/joserfc/security/advisories/GHSA-5jhw-7jv7-qcqq"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:e2050c8426ea9f7370f2ab2167a57c10c235f36b6d5763009567f342271fa4e6 · sha256:0a85630fa3509697… · /containers/cna/references/0

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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