CVE-2026-55777

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 82% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
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: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

GoAccess is a real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems or through the browser. Prior to 1.11, the parse_ios() function uses an attacker-controlled keyword-to-OS offset as both the source offset and copy length for memmove, allowing a crafted User-Agent in a processed access log to read up to approximately 4 KB beyond the heap allocation and conditionally crash GoAccess. This issue is fixed in version 1.11.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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 computed
Severity53% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

July 30, 2026

Last Modified

July 31, 2026

Advisory Details (2)

Auto-updated Jul 30, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Out-of-bounds heap read in parse_ios() via crafted User-Agent (opesys.c:323) lead to remote crash/DoS · Advisory · allinurl/goaccess · GitHub

https://github.com/allinurl/goaccess/security/advisories/GHSA-5phr-qpgf-hgrg
github_commit

commit ba813ed97d99 (allinurl/goaccess)

Fix landed in allinurl/goaccess commit ba813ed97d99 — awaiting tagged release

https://github.com/allinurl/goaccess/commit/ba813ed97d998dbdcb8d87e178799a4bb2da9e81

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
goaccess1:1.10.1-1 ... 1:1.9.4-1 (9 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
goaccess1:1.10.1-1 ... 1:1.9.4-1 (6 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
goaccess1:1.10.1-1, 1:1.9.3-1, 1:1.9.4-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
goaccess1:1.10.1-1, 1:1.9.3-1, 1:1.9.4-1——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 51× 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.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 22:29 UTCEG score recompute
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-27 14:44 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-26 14:46 UTCEPSS rescore
  7. 2026-08-26 13:34 UTCEG score recompute
  8. 2026-08-25 13:49 UTCEPSS rescore
  9. 2026-08-25 12:33 UTCEG score recompute
  10. 2026-08-24 11:32 UTCEG score recompute
  11. 2026-08-23 10:32 UTCEG score recompute
  12. 2026-08-23 00:19 UTCEPSS rescore
  13. 2026-08-22 09:32 UTCEG score recompute
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 08:32 UTCEG score recompute
  16. 2026-08-20 22:55 UTCEPSS rescore
  17. 2026-08-20 07:32 UTCEG score recompute
  18. 2026-08-19 17:04 UTCEPSS rescore
  19. 2026-08-19 06:33 UTCEG score recompute
  20. 2026-08-18 13:48 UTCEPSS rescore
  21. 2026-08-18 05:31 UTCEG score recompute
  22. 2026-08-17 13:47 UTCEPSS rescore
  23. 2026-08-17 04:16 UTCEG score recompute
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 03:16 UTCEG score recompute
Show 29 more
  1. 2026-08-16 02:14 UTCEPSS rescore
  2. 2026-08-15 02:15 UTCEG score recompute
  3. 2026-08-15 01:30 UTCEPSS rescore
  4. 2026-08-14 01:16 UTCEG score recompute
  5. 2026-08-13 22:00 UTCEPSS rescore
  6. 2026-08-13 00:17 UTCEG score recompute
  7. 2026-08-12 13:51 UTCEPSS rescore
  8. 2026-08-11 23:17 UTCEG score recompute
  9. 2026-08-11 00:00 UTCEPSS rescore
  10. 2026-08-09 21:17 UTCEG score recompute
  11. 2026-08-09 13:46 UTCEPSS rescore
  12. 2026-08-08 20:18 UTCEG score recompute
  13. 2026-08-08 16:37 UTCEPSS rescore
  14. 2026-08-07 19:18 UTCEG score recompute
  15. 2026-08-06 18:19 UTCEG score recompute
  16. 2026-08-06 13:47 UTCEPSS rescore
  17. 2026-08-05 19:17 UTCEPSS rescore
  18. 2026-08-04 16:19 UTCEG score recompute
  19. 2026-08-04 15:10 UTCEPSS rescore
  20. 2026-08-04 10:39 UTCEPSS rescore
  21. 2026-08-03 15:19 UTCEG score recompute
  22. 2026-08-03 10:36 UTCEPSS rescore
  23. 2026-08-01 13:20 UTCEG score recompute
  24. 2026-08-01 04:16 UTCEPSS rescore
  25. 2026-07-31 12:18 UTCEG score recompute
  26. 2026-07-31 12:00 UTCEG score recompute
  27. 2026-07-30 21:35 UTCEG score recompute
  28. 2026-07-30 21:02 UTCEG score recompute
  29. 2026-07-30 21:01 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55777?
CVE-2026-55777 is a medium vulnerability published on July 30, 2026. GoAccess is a real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems or through the browser. Prior to 1.11, the parse_ios() function uses an attacker-controlled keyword-to-OS offset as both the source offset and copy length for memmove, allowing a crafted…
When was CVE-2026-55777 disclosed?
CVE-2026-55777 was first published in the National Vulnerability Database on July 30, 2026, with the most recent update on July 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55777 actively exploited?
CVE-2026-55777 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 82.2% of all scored CVEs.
What is the CVSS score of CVE-2026-55777?
CVE-2026-55777 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-55777?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55777, 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

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