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VulnerabilityPublished

CVE-2026-65632: potatosalad jose · Improper Verification of Cryptographic Signature

Affects potatosalad joseSource CVE Database V5

0

Not known to be exploited · CVSS 5.1 Medium : upgrade to 1.11.13 when convenient.

Data as of 26 Oct 2026, 20:14 UTC

CVSS 4.0 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.11.13, 72ce1866622b9329347dc52a94173ac0317bc9cf
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade jose to 1.11.13; jose to 72ce1866622b9329347dc52a94173ac0317bc9cf.

Affected software

ProductAffectedFixed in
potatosaladjoseAffected
  • >=1.0.0 <1.11.13
Fixed in
  • 1.11.13
josepotatosalad/erlang-joseAffected
  • ≥ a7746ecd4950f85a393136e449a91dac62b5c429, < 72ce1866622b9329347dc52a94173ac0317bc9cf
Fixed in
  • 72ce1866622b9329347dc52a94173ac0317bc9cf
Hexjosepkg:hex/joseOther threatsAffected
  • >=1.0.0 <1.11.13
Fixed in
  • 1.11.13

CPE configurations (1)

  • cpe:2.3:a:potatosalad:jose:*:*:*:*:*:*:*:*

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available in jose version 1.11.13 that fixes this improper signature verification. Users should upgrade to version 1.11.13 or later to remediate this issue. Since a fix exists, applying the official update is the recommended mitigation.

Description

The jose library versions from 1.0.0 up to but not including 1.11.13 improperly verify ECDSA JWS signatures by accepting signatures of non-canonical length. This signature malleability allows multiple distinct signature byte strings to verify as valid for the same token, defeating security controls that rely on signature uniqueness such as token revocation by hash, replay caches, and deduplication. The underlying cryptographic signature values (r, s) remain unchanged, so forging new payloads or impersonating signers is not possible. A fix is available in version 1.11.13.

References

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