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Vulnerability record · public intelligence
CVE-2025-4945
LOW

Libsoup: integer overflow in cookie expiration date handling in libsoup

Published May 19, 2025 · Updated Nov 3, 2026

Severity · CVSSLOW · Not scored
Known exploitationNot listed
EPSS / likelihood0.70%
QFinch risk scoreNot available

Original summary

Normalized public record · Updated Nov 3, 2026

Libsoup: integer overflow in cookie expiration date handling in libsoup

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

A flaw was found in the cookie parsing logic of the libsoup HTTP library, used in GNOME applications and other software. The vulnerability arises when processing the expiration date of cookies, where a specially crafted value can trigger an integer overflow. This may result in undefined behavior, allowing an attacker to bypass cookie expiration logic, causing persistent or unintended cookie behavior. The issue stems from improper validation of large integer inputs during date arithmetic operations within the cookie parsing routines.

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

FIRST-EPSSCVE-LIST-V5
SSVC priority
LOW
Confidence
Not available
Aliases
None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. RHSA-2025:19713 ↗
  2. RHSA-2025:19714 ↗
  3. RHSA-2025:19720 ↗
  4. RHSA-2025:20959 ↗
  5. RHSA-2025:21032 ↗
  6. RHSA-2025:21655 ↗
  7. RHSA-2025:21656 ↗
  8. RHSA-2025:21657 ↗
  9. RHSA-2025:21664 ↗
  10. RHSA-2025:21665 ↗
  11. RHSA-2025:21666 ↗
  12. RHSA-2025:21772 ↗

Record history

Published May 19, 2025 · Last refreshed Nov 3, 2026

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