CVE-2026-77014

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-63225 (ENISA EUVD) · GHSA-wmpg-2mpv-2hmm (GitHub Security Advisories)Source: ENISA EUVD

5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity53% × 45%
Impact severity (EG Severity): CVSS 5.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
14th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.

EG Severity
5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-26). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 20, 2026

Last Modified

October 27, 2026

Advisory Details (3)

Auto-updated Aug 20, 2026
Patch available. Sources: redhat.
Web page

message-headers: Fix Range and Content-Range parsing (!550) · Merge requests · GNOME / libsoup · GitLab

https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/550
Red Hat

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=2520143
Red HatMentions a patch (unverified)

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-2026-77014

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibsoup2.4-tests (2.74.2-3ubuntu0.9) @ jammy2026-10-27ubuntu
ubuntulibsoup-3.0-tests (3.6.6-1ubuntu3) @ stonking2026-10-27ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
libsoup2.42.74.3-1 ... 2.74.3-9 (16 versions)
  • every version on: no fix on record
—
libsoup33.2.2-2 ... 3.6.6-1 (35 versions)
  • every version on: no fix on record
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
libsoup2.42.74.3-10.1, 2.74.3-11
  • every version on: no fix on record
—
libsoup33.6.5-3 ... 3.6.6-1 (8 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libsoup33.6.5-3 ... 3.6.6-1 (8 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 55× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 199 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 99 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  6. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-10-27 10:26 UTCEG score recompute
  8. 2026-10-27 10:26 UTCVendor advisory
  9. 2026-10-27 10:26 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  11. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  12. 2026-10-25 14:01 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  15. 2026-10-22 18:25 UTCEG score recompute
  16. 2026-10-22 18:25 UTCVendor advisory
  17. 2026-10-22 18:25 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  18. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  22. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  23. 2026-10-18 03:12 UTCEG score recompute
  24. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 13th percentile
Show 75 more
  1. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  5. 2026-10-12 15:37 UTCEG score recompute
  6. 2026-10-11 19:23 UTCEG score recompute
  7. 2026-10-11 16:39 UTCEG score recompute
  8. 2026-10-11 13:58 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  13. 2026-10-08 05:40 UTCEG score recompute
  14. 2026-10-08 05:40 UTCVendor advisory
  15. 2026-10-08 05:40 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  16. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  17. 2026-10-07 03:54 UTCEG score recompute
  18. 2026-10-07 03:54 UTCVendor advisory
  19. 2026-10-07 03:54 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-10-06 03:39 UTCEG score recompute
  22. 2026-10-06 03:39 UTCVendor advisory
  23. 2026-10-06 03:39 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  24. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  26. 2026-10-04 21:20 UTCVendor advisory
  27. 2026-10-04 21:20 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  28. 2026-10-03 16:50 UTCEG score recompute
  29. 2026-10-03 16:50 UTCVendor advisory
  30. 2026-10-03 16:50 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  31. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  32. 2026-10-02 09:12 UTCEG score recompute
  33. 2026-10-02 09:12 UTCVendor advisory
  34. 2026-10-02 09:12 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  35. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  36. 2026-10-01 08:41 UTCEG score recompute
  37. 2026-10-01 08:41 UTCVendor advisory
  38. 2026-10-01 08:41 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  39. 2026-09-30 08:25 UTCEG score recompute
  40. 2026-09-30 08:25 UTCVendor advisory
  41. 2026-09-30 08:25 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  42. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  43. 2026-09-29 04:06 UTCEG score recompute
  44. 2026-09-29 04:06 UTCVendor advisory
  45. 2026-09-29 04:06 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  46. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  47. 2026-09-28 03:50 UTCEG score recompute
  48. 2026-09-28 03:50 UTCVendor advisory
  49. 2026-09-28 03:50 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  50. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  51. 2026-09-27 03:28 UTCEG score recompute
  52. 2026-09-27 03:28 UTCVendor advisory
  53. 2026-09-27 03:27 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  54. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  55. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  56. 2026-09-25 06:50 UTCEG score recompute
  57. 2026-09-25 06:50 UTCVendor advisory
  58. 2026-09-25 06:50 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  59. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  60. 2026-09-24 06:36 UTCEG score recompute
  61. 2026-09-24 06:36 UTCVendor advisory
  62. 2026-09-24 06:36 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  63. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  64. 2026-09-23 06:20 UTCEG score recompute
  65. 2026-09-23 06:20 UTCVendor advisory
  66. 2026-09-23 06:20 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  67. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  68. 2026-09-22 06:06 UTCEG score recompute
  69. 2026-09-22 06:06 UTCVendor advisory
  70. 2026-09-22 06:06 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  71. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  72. 2026-09-21 05:50 UTCEG score recompute
  73. 2026-09-21 05:50 UTCVendor advisory
  74. 2026-09-21 05:50 UTCGHSA enrichmentGHSA-wmpg-2mpv-2hmm · GitHub CVSS 5.3
  75. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 14th percentile

Frequently asked(5)

What is CVE-2026-77014?
CVE-2026-77014 is a medium-severity vulnerability; its CVE record was published on August 20, 2026. 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…
When was CVE-2026-77014 made public?
CVE-2026-77014 was made public on July 13, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on August 20, 2026. EchelonGraph's copy of the record carries a last-modified date of October 27, 2026; the record at its source may have been updated since.
Is CVE-2026-77014 actively exploited?
CVE-2026-77014 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77014?
CVE-2026-77014 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77014?
A fix for CVE-2026-77014 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-77014 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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