CVE-2025-68702Network attack vector

Integrity-check failures via truncated leading-zero SHA-256 digests

Published Jan 13, 2026 · Updated Jan 13, 2026

Cryptographic hash generation in Jervis before 2.2 allows remote attackers to cause integrity-check failures via crafted inputs. SecurityIO.sha256Sum converts the 32-byte digest through BigInteger and pads the result to only 32 rather than 64 hexadecimal characters, dropping required leading zeros. The issue affects consumers that call this method directly and rely on fixed-length hash strings, causing comparisons involving leading-zero digests to fail.

CVSS severity8.7
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cryptographic hash generation in Jervis before 2.2 allows remote attackers to cause integrity-check failures via crafted inputs. SecurityIO.sha256Sum converts the 32-byte digest through BigInteger and pads the result to only 32 rather than 64 hexadecimal characters, dropping required leading zeros. The issue affects consumers that call this method directly and rely on fixed-length hash strings, causing comparisons involving leading-zero digests to fail.

The record

CVE
CVE-2025-68702
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
Sam Gleske
Product
Jervis
Classifications
CWE-327
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sam Gleske · Jervisversion=< 2.2

Published CVSS scores

8.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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