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Response snapshot Oct 29, 2026, 18:26 UTC

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VulnerabilityCVE-2026-61848

Crass: Non-ASCII characters cause superlinear CPU consumption

When parsing an input containing non-ASCII characters, inefficiencies in how Crass tracks the positions of multi-byte characters result in superlinear parsing time.

At a glance

Exploited
Not known
Severity
6.3 Medium (CVSS 4.0)
Chance of exploitation
Not estimated
Sources
1 source

What to do

GitHub lists first patched versions: crass: 1.0.7. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-8vfg-2r28-hvhj (opens a new tab)

What happened

Impact

When parsing an input containing non-ASCII characters, inefficiencies in how Crass tracks the positions of multi-byte characters result in superlinear parsing time. An attacker-controlled input consisting of many non-ASCII characters could cause excessive CPU consumption and potentially denial of service.

Patches

This is fixed in Crass 1.0.7.

Continue reading

Workarounds

Avoid passing non-ASCII input to Crass. Or cultivate patience.

Affected package ranges reported by GitHub: crass: < 1.0.7

Scores and how they were measured

CVSS base severity

6.3

Version 4.0As of

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

Not available

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    GitHub-reviewed advisory GHSA-8vfg-2r28-hvhj (opens a new tab)

    The public advisory supplies the description, affected package/version ranges, and any listed CVSS metric. GitHub review is not local review.

    Published Checked

  2. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-8vfg-2r28-hvhj, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 29). Crass: Non-ASCII characters cause superlinear CPU consumption (CVE-2026-61848). https://kevwire.com/record/CVE-2026-61848

MLA

"Crass: Non-ASCII characters cause superlinear CPU consumption (CVE-2026-61848)." KEVWire, 29 Oct. 2026, kevwire.com/record/CVE-2026-61848.

Chicago

KEVWire. "Crass: Non-ASCII characters cause superlinear CPU consumption (CVE-2026-61848)." Last modified October 29, 2026. https://kevwire.com/record/CVE-2026-61848.

Evidence summary (plain text)

Crass: Non-ASCII characters cause superlinear CPU consumption (Oct 29, 2026).
When parsing an input containing non-ASCII characters, inefficiencies in how Crass tracks the positions of multi-byte characters result in superlinear parsing time. An attacker-controlled input consisting of many non-ASCII characters could cause excessive CPU consumption and potentially denial of service.

This is fixed in Crass 1.0.7.

Avoid passing non-ASCII input to Crass. Or cultivate patience.
CVSS 6.3 (version 4.0; evidence as of Oct 29, 2026; https://github.com/advisories/GHSA-8vfg-2r28-hvhj).
Sources:
GitHub-reviewed advisory GHSA-8vfg-2r28-hvhj: https://github.com/advisories/GHSA-8vfg-2r28-hvhj
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc
Record ID: CVE-2026-61848.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 29, 2026, 18:26 UTC. Ingestion is not an independent editorial investigation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

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Record details

Record detail