A flaw was found in libsoup's SoupServer HTTP Range header processing. The sort_ranges() comparator in soup-message-headers.c truncates a 64-bit subtraction result to 32-bit int, flipping the sign for range offsets differing by more than INT_MAX. This causes silent omission of requested byte ranges from HTTP 206 Partial Content responses on resources larger than approximately 2 GB.
CVE-2026-77014
MEDIUMPre-NVD 5.35.3—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 5.3 from GitHub Security Advisory published 2026-08-20. a secondary CVSS source baseline 5.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.3
- EG Score
- 5.3(high)
- EG Risk
- 28(Track)EG Risk 28/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity53% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 14%
- KEV
- Not listed
Published
August 20, 2026
Last Modified
August 20, 2026
Advisory Details (3)
Auto-updated Aug 20, 2026Patch available. Sources: redhat.
generic
message-headers: Fix Range and Content-Range parsing (!550) · Merge requests · GNOME / libsoup · GitLab
https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/550redhat
2520143 – (CVE-2026-77014) CVE-2026-77014 libsoup: libsoup: Integer truncation in sort_ranges() comparator causes silent omission of HTTP Range responses
https://bugzilla.redhat.com/show_bug.cgi?id=2520143redhat Patch Available
CVE-2026-77014 - Red Hat Customer Portal
Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a
https://access.redhat.com/security/cve/CVE-2026-77014Vendor Advisories for CVE-2026-77014(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 6× in last 7d / 6× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-08-20 22:56 UTCEPSS rescore
- 2026-08-20 13:11 UTCEG score recompute
- 2026-08-20 13:11 UTCGHSA enrichment
- 2026-08-20 09:24 UTCEG score recompute
- 2026-08-20 08:37 UTCEG score recompute
- 2026-08-20 08:36 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-77014?
CVE-2026-77014 is a medium vulnerability published on August 20, 2026. A flaw was found in libsoup's SoupServer HTTP Range header processing. The sortranges() comparator in soup-message-headers.c truncates a 64-bit subtraction result to 32-bit int, flipping the sign for range offsets differing by more than INTMAX. This causes silent omission of requested byte ranges…
When was CVE-2026-77014 disclosed?
CVE-2026-77014 was first published in the National Vulnerability Database on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77014 actively exploited?
CVE-2026-77014 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 85.6% of all scored CVEs.
What is the CVSS score of CVE-2026-77014?
CVE-2026-77014 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-77014?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77014, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-77014
Is Your Infrastructure Affected by CVE-2026-77014?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.