Comments (1)
Parsing a signed JWT (a JWS) without the key should always be considered unsafe.
Exactly how unsafe it is up to your particular environment (and how much risk is acceptable).
To see how it would work in action you can take a look at https://token.dev.
Start with the default example, and then change the algorithm dropdown to a different value, and then to none.
You will notice that the header and signature sections of the compact JWT string changes, but the middle section will stay the same. You can copy/paste the middle section into https://www.base64decode.org/, and you will see the JSON payload.
TL;DR removing the signature validation, removes all of the security associated with a JWT
from jjwt.
Related Issues (20)
- Error building JWT with non-string audience claim type HOT 4
- A single audience value gets converted into a set with one entry HOT 1
- Disable Jackson ObjectMapper FAIL_ON_UNKNOWN_PROPERTIES Deserialization Feature HOT 1
- Unable to extract claims when cty specified in JWS header (>0.12.0) HOT 19
- Question: How far is version 1.0 (due to breaking changes in 0.12)?
- NIST Elliptic Curve JWK field element octet string padding HOT 1
- Impossible to build a JWK with `alg: HS512` and a `k` that is larger than 64 bytes HOT 2
- Make JacksonDeserializer constructor public
- Unable to access jcaName from Jwts.SIG HOT 2
- Jwts.builder - audience cannot be add without calling add() HOT 5
- Consider a convenience method to obtain a `Jwk` from a `JwkSet` by Key ID HOT 4
- Deprecation of support for unsecured JWT token parsing with algo != 'none' HOT 3
- NoSuchMethodError when using libraries built against older jjwt version HOT 2
- Unable to verify Elliptic Curve signature using configured ECPublicKey. Invalid encoding for signature HOT 2
- CVE reported against 0.11.5 HOT 5
- CVE-2024-31033 (v0.12.5) HOT 2
- java.lang.IllegalArgumentException: Invalid Map 'iv' (Initialization Vector) value: 1230868678. Values must be either String or [B instances. Value type found: java.math.BigInteger. HOT 4
- JWE arbitrary content compression/decompression error
- X5C header does not accept a chain of certificates longer than 1 HOT 6
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from jjwt.